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USCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream UC SAN DIEGO, HUMANITIES AND SOCIAL SCIENCES BUILDING UC San Diego is undertaking a project to renovate and rehabilitate the Humanities and Social Sciences (HSS) Building. The building, designed by Richard George Wheeler, AIA, & Associates, was constructed circa 1970 and is designated a historic building. SGH provided building enclosure and fire life safety consulting services for the project, which focuses on the centralJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, and WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includes SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream UC SAN DIEGO, HUMANITIES AND SOCIAL SCIENCES BUILDING UC San Diego is undertaking a project to renovate and rehabilitate the Humanities and Social Sciences (HSS) Building. The building, designed by Richard George Wheeler, AIA, & Associates, was constructed circa 1970 and is designated a historic building. SGH provided building enclosure and fire life safety consulting services for the project, which focuses on the centralJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, and WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includesKNOWLEDGE SHARING
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
MATERIALS DESIGN
The science of materials evolves continuously. SGH develops and conducts tests to evaluate new materials and new or unusual applications of traditional materials. SGH analyzes materials to determine how production and service environments affect material properties to improve safety, reliability, and performance of components and systems. Our expertise encompasses a wide range of SEAONC APPOINTS SGHS KEVIN MOORE AS PRESIDENT, HONORS RON The Structural Engineers Association of Northern California (SEAONC) recently recognized two Simpson Gumpertz & Heger (SGH) senior principals for their leadership in the industry and contributions as structural engineers. On 1 June 2021, SEAONC hosted their annual business meeting, which included a virtual celebration where Kevin Moore was installed as President of SEAONC and RonERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure. TIMBER+ MASS TIMBER ARCHITECTURE ROUNDTABLE To kick off the 2021 TIMBER+ forum cycle hosted by Simpson Gumpertz & Heger (SGH), a panel of three leading architects will share their experiences within the mass timber industry and discuss what they see as the opportunities and challenges for mass timber construction. TIMBER+ is a recurring forum of timber design and construction professionals to share knowledge and discuss STABILIZING SAN FRANCISCOS LEANING TOWER Abstract Located at 301 Mission Street, the 650-foot-tall Millennium Tower was designed to be San Francisco’s premier residential address. The project geotechnical report predicted 4 to 6 inches of settlement over the project’s life; however, as construction neared completion in 2009, the settlement had already reached 10 inches. As development occurred on adjacent parcels, accompanied by SAN FRANCISCO BAY AREA Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
MEHDI ZARGHAMEE
Dr. Zarghamee has forty-five years of consulting, academic, and management experience. He specializes in structural engineering and applied mechanics, infrastructures, and mathematics. His experience includes analysis and design of complex structures and mechanical systems, investigation including condition assessment, failure risk analysis of structures and infrastructuresCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream UC SAN DIEGO, HUMANITIES AND SOCIAL SCIENCES BUILDING UC San Diego is undertaking a project to renovate and rehabilitate the Humanities and Social Sciences (HSS) Building. The building, designed by Richard George Wheeler, AIA, & Associates, was constructed circa 1970 and is designated a historic building. SGH provided building enclosure and fire life safety consulting services for the project, which focuses on the centralJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, and WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includes SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream UC SAN DIEGO, HUMANITIES AND SOCIAL SCIENCES BUILDING UC San Diego is undertaking a project to renovate and rehabilitate the Humanities and Social Sciences (HSS) Building. The building, designed by Richard George Wheeler, AIA, & Associates, was constructed circa 1970 and is designated a historic building. SGH provided building enclosure and fire life safety consulting services for the project, which focuses on the centralJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, and WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includesKNOWLEDGE SHARING
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
MATERIALS DESIGN
The science of materials evolves continuously. SGH develops and conducts tests to evaluate new materials and new or unusual applications of traditional materials. SGH analyzes materials to determine how production and service environments affect material properties to improve safety, reliability, and performance of components and systems. Our expertise encompasses a wide range of SEAONC APPOINTS SGHS KEVIN MOORE AS PRESIDENT, HONORS RON The Structural Engineers Association of Northern California (SEAONC) recently recognized two Simpson Gumpertz & Heger (SGH) senior principals for their leadership in the industry and contributions as structural engineers. On 1 June 2021, SEAONC hosted their annual business meeting, which included a virtual celebration where Kevin Moore was installed as President of SEAONC and RonERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure. TIMBER+ MASS TIMBER ARCHITECTURE ROUNDTABLE To kick off the 2021 TIMBER+ forum cycle hosted by Simpson Gumpertz & Heger (SGH), a panel of three leading architects will share their experiences within the mass timber industry and discuss what they see as the opportunities and challenges for mass timber construction. TIMBER+ is a recurring forum of timber design and construction professionals to share knowledge and discuss STABILIZING SAN FRANCISCOS LEANING TOWER Abstract Located at 301 Mission Street, the 650-foot-tall Millennium Tower was designed to be San Francisco’s premier residential address. The project geotechnical report predicted 4 to 6 inches of settlement over the project’s life; however, as construction neared completion in 2009, the settlement had already reached 10 inches. As development occurred on adjacent parcels, accompanied by SAN FRANCISCO BAY AREA Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
MEHDI ZARGHAMEE
Dr. Zarghamee has forty-five years of consulting, academic, and management experience. He specializes in structural engineering and applied mechanics, infrastructures, and mathematics. His experience includes analysis and design of complex structures and mechanical systems, investigation including condition assessment, failure risk analysis of structures and infrastructuresCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination of SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.NIKLAS VIGENER
Niklas Vigener is a Senior Principal and the Head of Building Technology at Simpson Gumpertz & Heger (SGH). Since joining SGH in 1995, he has led many of the firm’s most notable building technology and historic preservation projects. His particular area of interest is the careful rehabilitation of historic buildings to incorporate high-performance building enclosures.MICHAEL TECCI
Michael Tecci joined Simpson Gumpertz & Heger Inc. in 2003. He has more than ten years of experience as a structural design engineer in SGH’s Structural Design team in the Boston office. His structural design experience encompasses a wide variety of building types, though mostly in educational and institutional buildings. His experience includes design of new structures,NATHANIEL SMITH
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
CHERYL SALDANHA
Cheryl Saldanha specializes in the design and evaluation of building enclosures for new construction projects, and in the investigation and renovation of building enclosures for existing buildings. She has a wide range of experience including rainscreen facade, curtain wall, roofing and waterproofing systems. Her background is in building science, including computerMATTHEW BRONSKI
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includesKENNETH KLEIN
Ken leads the West Coast Building Technology division, and is experienced in the design and investigation of waterproofing of commercial, institutional, and residential buildings. His work addresses issues related to the integrity of curtain walls, roofs, plaza deck, and below-grade systems on a wide-range of structures from residential and high-rise building to buildings of historic SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination of SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanks LAKE LIVINGSTON HYDROELECTRIC PLANT East Texas Electric Cooperative (ETEC) commissioned construction of a new hydroelectric plant at the site of the fifty-year-old Lake Livingston Dam, an approximately 2.5 mi earthen embankment that impounds a water supply reservoir. The project included constructing an intake structure at the embankment, three reinforced concrete penstocks, and a powerhouse on the downstream EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.NIKLAS VIGENER
Niklas Vigener is a Senior Principal and the Head of Building Technology at Simpson Gumpertz & Heger (SGH). Since joining SGH in 1995, he has led many of the firm’s most notable building technology and historic preservation projects. His particular area of interest is the careful rehabilitation of historic buildings to incorporate high-performance building enclosures.MICHAEL TECCI
Michael Tecci joined Simpson Gumpertz & Heger Inc. in 2003. He has more than ten years of experience as a structural design engineer in SGH’s Structural Design team in the Boston office. His structural design experience encompasses a wide variety of building types, though mostly in educational and institutional buildings. His experience includes design of new structures,NATHANIEL SMITH
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
CHERYL SALDANHA
Cheryl Saldanha specializes in the design and evaluation of building enclosures for new construction projects, and in the investigation and renovation of building enclosures for existing buildings. She has a wide range of experience including rainscreen facade, curtain wall, roofing and waterproofing systems. Her background is in building science, including computerMATTHEW BRONSKI
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
WINDOW RECEPTOR FRAMES: WHAT YOU NEED TO KNOW Window Receptor Frames: What You Need to Know. June 29, 2007. Publication: RCI Interface. Author (s): Derek McCowan Michael Louis. Abstract: Designers often wrestle with the question of whether or not to include a receptor frame (or sub-frame) around aluminum window assemblies and how to specify these important components.NATHAN WITTASEK
Nate has twenty years of experience working in the fire protection and regulatory arenas. Nate brings a practical approach to the fire protection engineering field that reflects his diverse training and experiences in academia, codes consulting for both new and existing facilities, performance-based fire protection engineering, sustainable design, and the fire service. His experience includesKENNETH KLEIN
Ken leads the West Coast Building Technology division, and is experienced in the design and investigation of waterproofing of commercial, institutional, and residential buildings. His work addresses issues related to the integrity of curtain walls, roofs, plaza deck, and below-grade systems on a wide-range of structures from residential and high-rise building to buildings of historic SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanksERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June 18, 2021 12:00pm / Online Zoom Webinar. PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanksERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through CONTACT US | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
BIOS | SIMPSON GUMPERTZ & HEGER David Burns, AIA Principal, STUDIOS Architecture David Burns constantly challenges the idea that space is a limitation. His approach to design is that space – no matter its size or shape – is an opportunity. David is adept with big-picture thinking and attention to minute details, with experience ranging from base building and master planning to building renovation and complex office TELESCOPE | SIMPSON GUMPERTZ & HEGER Astronomers and scientists demand sophisticated telescopes to collect wave energy and produce high-quality images. Similarly, defense entities require high performance reflector and phased array radar antennas. To accomplish these goals, the antenna and telescope structures need to meet stringent requirements for natural frequency; tight tolerances on deformations underHIGHWAY & TUNNEL
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
TUNNEL | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.CHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.NIKLAS VIGENER
Niklas Vigener is a Senior Principal and the Head of Building Technology at Simpson Gumpertz & Heger (SGH). Since joining SGH in 1995, he has led many of the firm’s most notable building technology and historic preservation projects. His particular area of interest is the careful rehabilitation of historic buildings to incorporate high-performance building enclosures.KENNETH KLEIN
Ken leads the West Coast Building Technology division, and is experienced in the design and investigation of waterproofing of commercial, institutional, and residential buildings. His work addresses issues related to the integrity of curtain walls, roofs, plaza deck, and below-grade systems on a wide-range of structures from residential and high-rise building to buildings of historic SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanksERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanksERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
JOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through CONTACT US | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
BIOS | SIMPSON GUMPERTZ & HEGER David Burns, AIA Principal, STUDIOS Architecture David Burns constantly challenges the idea that space is a limitation. His approach to design is that space – no matter its size or shape – is an opportunity. David is adept with big-picture thinking and attention to minute details, with experience ranging from base building and master planning to building renovation and complex office TELESCOPE | SIMPSON GUMPERTZ & HEGER Astronomers and scientists demand sophisticated telescopes to collect wave energy and produce high-quality images. Similarly, defense entities require high performance reflector and phased array radar antennas. To accomplish these goals, the antenna and telescope structures need to meet stringent requirements for natural frequency; tight tolerances on deformations underHIGHWAY & TUNNEL
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
TUNNEL | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.CHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.NIKLAS VIGENER
Niklas Vigener is a Senior Principal and the Head of Building Technology at Simpson Gumpertz & Heger (SGH). Since joining SGH in 1995, he has led many of the firm’s most notable building technology and historic preservation projects. His particular area of interest is the careful rehabilitation of historic buildings to incorporate high-performance building enclosures.KENNETH KLEIN
Ken leads the West Coast Building Technology division, and is experienced in the design and investigation of waterproofing of commercial, institutional, and residential buildings. His work addresses issues related to the integrity of curtain walls, roofs, plaza deck, and below-grade systems on a wide-range of structures from residential and high-rise building to buildings of historic SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
NATIONAL MISSILE DEFENSE, INFLATED FABRIC RADOME FOR SEA The Sea-Based X-Band Radar (SBX) is a major component of the Ground-Based Mid-Course Missile Defense (GMD). The SBX is a mechanically steerable, phased-array radar antenna mounted on a self-propelled, ocean-going, semi-submersible platform. This advanced X-Band Radar (XBR) is housed within an inflated radome designed to protect the radar from the harsh sea environment andJOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through SIMPSON GUMPERTZ & HEGERSERVICESMARKETSPROJECTSKNOWLEDGE SHARINGABOUTUSCAREERS
Simpson Gumpertz & Heger Inc. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
PRESERVATION TECHNOLOGY Preservation Technology. Successful repairs to historic buildings require more than an understanding of materials or recognizing symptoms of problems. Successful repair is achieved by understanding the nature and root causes of problems and by approaching solutions in a way that balances effective treatments, historic issues, and projectbudgets.
EVENTS | SIMPSON GUMPERTZ & HEGER Each system has unique characteristics that identify its place in time and impact its overall performance. In this webinar, we will introduce common building systems over three time periods, explore how the systems evolved, and discuss advantages and limitations for each. June18, 2021 12:00pm /
ERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure.JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases. WHY IS FORENSIC INVESTIGATION WORK REWARDING? Why Is Forensic Investigation Work Rewarding? It is important to bring curiosity and problem solving to any forensic investigation, whether it's for an attorney, a developer, a school district, or any other client experiencing a serious issue. At the end of the day, that client wants to know that the issue is resolved. This opens in a newwindow.
NATIONAL MISSILE DEFENSE, INFLATED FABRIC RADOME FOR SEA The Sea-Based X-Band Radar (SBX) is a major component of the Ground-Based Mid-Course Missile Defense (GMD). The SBX is a mechanically steerable, phased-array radar antenna mounted on a self-propelled, ocean-going, semi-submersible platform. This advanced X-Band Radar (XBR) is housed within an inflated radome designed to protect the radar from the harsh sea environment andJOSHUA GREENE
Joshua Greene brings diverse new experience to SGH’s Fire Engineering practice, specializing in assessing unique and challenging designs and employing performance-based approaches to provide clients with creative solutions that stand up to stringent code requirements. He has extensive experience in building and fire code consulting, fire protection system design, smoke control analyses, andCHRISTINE DIOSDADO
Christine has experience as a lead investigator and project manager on complex construction defect cases. Her investigation experience encompasses a wide variety of building types, including high-rise, residential, institutional, commercial, and medical buildings. Christine’s notable recent projects include flooring investigations at medical facilities, an examination ofJOSHUA KIVELA
Josh Kivela is experienced in the design, investigation, and rehabilitation of historic and contemporary buildings. He is a versatile and creative designer of high-performance building enclosure systems that require integration of complex glazing, wall, roofing, and waterproofing systems. Josh helps clients provide innovative and durable solutions to complex building problems through CONTACT US | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
BIOS | SIMPSON GUMPERTZ & HEGER David Burns, AIA Principal, STUDIOS Architecture David Burns constantly challenges the idea that space is a limitation. His approach to design is that space – no matter its size or shape – is an opportunity. David is adept with big-picture thinking and attention to minute details, with experience ranging from base building and master planning to building renovation and complex officeHIGHWAY & TUNNEL
Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
TELESCOPE | SIMPSON GUMPERTZ & HEGER Astronomers and scientists demand sophisticated telescopes to collect wave energy and produce high-quality images. Similarly, defense entities require high performance reflector and phased array radar antennas. To accomplish these goals, the antenna and telescope structures need to meet stringent requirements for natural frequency; tight tolerances on deformations under NATGUN WATER STORAGE TANKS DN Tanks (formerly Natgun) designs and constructs prestressed concrete liquid storage tanks. The tanks are American Water Works Association (AWWA) D110 prestressed wire-wound concrete tanks that incorporate precast concrete panels. SGH developed a seismic design procedure for the domes and peer reviewed the tank designs. We used the procedure to design a number of tanksERIK FARRINGTON
Erik Farrington has broad experience in the structural design of new construction and the repair and rehabilitation of numerous existing buildings. Erik is the principal liaison for SGH’s multidisciplinary structure-enclosure teams, which tackle integrated repairs and rehabilitation of historic building exteriors that double as both structure and enclosure. TUNNEL | SIMPSON GUMPERTZ & HEGER Simpson Gumpertz & Heger Inc. (SGH) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
JOHN PORTER
John Porter has extensive experience designing new structures, as well as investigating, repairing, rehabilitating, and analyzing existing structures. John helps private and public clients manage projects and project teams through design and construction phases.NIKLAS VIGENER
Niklas Vigener is a Senior Principal and the Head of Building Technology at Simpson Gumpertz & Heger (SGH). Since joining SGH in 1995, he has led many of the firm’s most notable building technology and historic preservation projects. His particular area of interest is the careful rehabilitation of historic buildings to incorporate high-performance building enclosures.KENNETH KLEIN
Ken leads the West Coast Building Technology division, and is experienced in the design and investigation of waterproofing of commercial, institutional, and residential buildings. His work addresses issues related to the integrity of curtain walls, roofs, plaza deck, and below-grade systems on a wide-range of structures from residential and high-rise building to buildings of historic Skip to main content CHINA PAVILION EXPO MILANO 2015 Structural and building enclosure design for timber-framed pavilion with an undulating roofCOLLABORATING
WITH TEAMS
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CHINA PAVILION EXPO MILANO 2015 Structural and building enclosure design for timber-framed pavilion with an undulating roofCOLLABORATING
WITH TEAMS
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SAN FRANCISCO WAR MEMORIAL VETERANS BUILDING Building enclosure and structural rehabilitation, including seismic upgrades, for 1932 Beaux-Arts structureFOCUSING
ON RESULTS
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INFLATED FABRIC RADOME FOR SEA-BASED X-BAND RADAR Development of global model of radar and platform, dynamic analysis, fluid structure interaction, time-history analysis of wave action, andfatigue analysis
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TO PROJECT CHALLENGESRead More
BAHA’I TEMPLE, SANTIAGO, CHILE Building enclosure and structural design, building science, and materials testing for new temple designed by Hariri PontariniArchitects
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TECHNICAL CAPABILITIESRead More
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SIMPSON GUMPERTZ & HEGER INC. (SGH®) is a national engineering firm that designs, investigates, and rehabilitates structures, building enclosures, and materials. Our award-winning work encompasses building, energy, civil/infrastructure, and science/defense projects in the United States, Canada, and more than thirty additionalcountries.
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CREATE + CONSTRUCT SYMPOSIUM EXPLORES RESILIENCY AND BUILDING PERFORMANCE IN NEW YORK CITY OCTOBER 15 Create + Construct brings together local experts to discuss how to facilitate recovery after natural disasters, protect physical assets and well-being from human-created incidents, and stay ahead of ever-changing codes and regulations. SEAOSC NAMES RUSSELL MCLELLAN YOUNG ENGINEER OF THE YEAR, HONORS SGH PROJECT ROBERTS PAVILION AT CLAREMONT MCKENNA COLLEGE The Structural Engineers Association of Southern California recently recognized Simpson Gumpertz & Heger as part of its annual awardscelebrations
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SGH STAFF MEMBERS TO LEAD CLASSES AND PRESENT PAPERS AT PORTS ‘19Blog Post
SHOWCASING COLLABORATION ON THE HYNES TUNNEL CEILING REMOVAL PROJECTNews
BSCES RECOGNIZES GLENN BELL WITH HONORARY MEMBER AWARDFEATURED
ABOUT US
WHAT IS BUILDING TECHNOLOGY? Take a look to learn about Building Technology and what is takes to be a part of the BT team at SGH®.READ MORE
ABOUT US
OUR PEOPLE
In this video, we reflect on who we are and what it means to be part of Simpson Gumpertz & Heger.READ MORE
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This video reminds us of how the talented professionals at SGH® come together each day to deliver outstanding results for our clients.Read More
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