Steve Freihon/Related-Oxford
New York, New York
New York
120 Broadway
15th Floor
New York, NY 10271-0016
United States
Phone: +1.917.661.7800
Fax: +1.917.725.8773
✔ How we can help with New York City's FISP/LL-11 façade inspections, LL-126 parking inspections & LL-97 GHG emissions standard
Our Team
Featured New York Projects
Related Projects
Featured Project
The David H. Koch Center For Cancer Care Our innovative resilience strategy safeguarded MSKCC’s premier cancer center from flooding – while vastly improving the patient experience.
Featured Project
The Shed How do we make an avant-garde arts center so flexible, it’s future-proof? Make it move, of course!
Featured Project
30 Hudson Yards How to build a 101-story, 2.6-million-square-foot office tower, the tallest at Hudson Yards, atop an operational rail yard.
Featured Project
One Vanderbilt How do you construct a supertall building next to one of the world’s busiest transit hubs, and on an accelerated schedule? Start early, and carefully model the entire structure.
Featured Project
United States Embassy – London The Department of State built a new facility that sets a new paradigm in embassy design, termed Design Excellence, which emphasized the role of architecture in diplomacy.
Featured Project
VIA 57 West Unique buildings need equally unique structures. Our custom solutions deliver them cost-effectively, with built-in efficiency and resilience.
Featured Project
World Trade Center Transportation Hub We provided structural and protective design services for Calatrava's signature World Trade Center Transportation Hub.
Featured Project
The Alloy Block Set to include New York City's first all-electric residential tower, the development fosters a connection to place while planning for future decarbonization.
Featured Project
University of Oregon Knight Campus For the University of Oregon’s new Knight Campus, speed was critical. So was architectural and structural integrity. We helped achieve both.
Featured Project
Saint Nicholas National Shrine The new Saint Nicholas National Shrine at the World Trade Center replaces a church destroyed in the September 11 terrorist attacks.
Featured Project
Helmsley Building, 230 Park Avenue The Helmsley Building restoration sets a precedent for repairing historic terra cotta.
Featured Project
Hostile Vehicle Mitigation Combating risk is our specialty. To protect buildings from threats – in this case, hostile vehicles – we develop tailored solutions, informed on investigations of past events.
Featured Project
Ford Foundation Center for Social Justice When renovating an architectural icon, making the right choices to preserve its historical significance is essential.
Featured Project
Sherman Minton Bridge What if we could have investigated Minnesota’s I-35 Bridge three months before it collapsed? With the Sherman Minton Bridge, we had that chance.
Featured Project
Arecibo Radio Telescope What began as a maintenance project quickly shifted to a recovery and forensic investigation.
Featured Project
World Trade Center Response, Recovery and Analysis Starting with a walk-through on September 11, 2001, we began a multi-year, far-reaching mobilization and coordination of engineering services.
Featured Project
Sunnyside Yard Master Plan Reinventing what a sustainable, resilient, people-first community can be – by creating a neighborhood out of thin air.
Featured Project
Ministry of Taxes Tower With its striking design, the Ministry of Taxes Tower adds a new twist to the Baku skyline.
Featured Project
SUNY Stony Brook Alternate Care Facility At the onset of the COVID-19 pandemic, we helped one of New York’s largest hospitals prepare to accommodate a potential deluge of patients.
Featured Project
Paysandú Master Plan Mitigating the impacts of flooding and fostering a sustainable, connected community in Paysandú, Uruguay.
Featured Project
St. Luke's Hospital Conversion Abandoned for decades, a pre-war hospital in New York has been restored and transformed into a high-end residential complex.
Featured Project
Hoboken Connect A multiphase, mixed-use development will reshape the New Jersey skyline while creating a vibrant, revitalized area near a major transit hub.Additional Projects
New York News
Insight
Flood Resilience: Designing for RecoveryMarch 25, 2026
Flood resilience design helps buildings recover quickly after flooding by protecting critical systems, reducing failure points, and planning for future climate risk.
Insight
Decarbonizing the Fine Art Supply ChainMarch 16, 2026
Engineering decarbonization doesn’t stop at the building envelope. Discover how Thornton Tomasetti and Crozier Fine Arts are applying systems engineering and carbon modeling to reduce operational emissions across the global fine art supply chain.
News
AI Roles in Engineering FirmsFebruary 26, 2026
As AI reshapes engineering, the real opportunity is scaling expertise. CTO Robert Otani shares how enterprise AI can connect global knowledge, reduce risk and support better project decisions.
News
Scarangello Named to NAEFebruary 12, 2026
Tom Scarangello has been elected to the National Academy of Engineering’s Class of 2026, recognizing nearly 50 years of leadership in structural innovation and long-span design.
News
Data Center MicrogridsFebruary 11, 2026
As grid constraints grow, data centers turn to microgrids for resilient, high-uptime power.
News
Shirley Chisholm Recreation Center OpensFebruary 11, 2026
The Shirley Chisholm Recreation Center is now open in East Flatbush, delivering a LEED Platinum–certified hub for fitness, learning and community.
Insight
How Distributed Energy Resources Are Reshaping Utility PlanningFebruary 04, 2026
Building more infrastructure isn’t always the smartest solution. Distributed energy resources (DERs) offer utilities a flexible, lower-risk way to meet growing demand while rethinking traditional approaches to grid expansion.
News
Anagram Gowanus Tops OutFebruary 03, 2026
Anagram Gowanus has topped out, advancing a flood-resilient mixed-use development along Brooklyn’s Gowanus Canal.
Insight
Fatigue Prediction for Welded StructuresJanuary 29, 2026
Accurately predicting weld fatigue requires more than conventional assumptions. Learn how advanced, stress-based fatigue analysis improves failure location prediction and fatigue life estimates for complex welded structures under real-world loading.
Insight
Integrated Nondestructive Testing for Aging InfrastructureJanuary 20, 2026
Learn how integrating GPR and ultrasonic testing improves nondestructive evaluation of aging infrastructure beyond single-method NDT.
Insight
How Decarbonization Is Redefining the Art IndustryJanuary 13, 2026
At Crozier Fine Arts’ sustainability panel, Thornton Tomasetti’s Pawel Woelke shared data-driven insights on how decarbonization, sustainable art logistics and climate control innovation can shape a lower-carbon art world.
News
Understanding New Jersey’s Proposed Parking Garage Inspection LawJanuary 12, 2026
New Jersey legislators have introduced Bill S-3636, a proposed regulation that would establish the state’s first formal inspection requirements for parking garages.
News
Climate Risk Mitigation for Resilient DevelopmentDecember 18, 2025
Climate risk is no longer a future consideration—it is shaping today’s real estate performance, insurability and valuation.
News
Principal Ali Ashrafi Discusses Fire Forensics for Toronto's Thorncliffe Park Drive FireDecember 11, 2025
A persistent Toronto condo fire is highlighting the risk of hard-to-reach spaces. Principal Ali Ashrafi explains why the Thorncliffe Park Drive fire was so hard to extinguish.
Insight
NYC Updates FISP Rules: New Plan Reduces Sidewalk Sheds and Enhances Façade SafetyNovember 19, 2025
Thornton Tomasetti’s recommendations are shaping new NYC FISP rules—introducing clearer definitions, a six-year cycle, and expanded use of drones and emerging technologies.
Insight
LEED v5 Certification ExplainedOctober 22, 2025
LEED v5 supports green building innovation by focusing on carbon, material reuse and climate resilience.
News
Navigating Commercial Property Insurance Before a HurricaneSeptember 03, 2025
Secure your commercial property with our guide to hurricane insurance. Learn about essential coverage types, risk scenarios from major carriers and how to file a claim effectively.
News
Risk Mitigation for Workplace DesignAugust 18, 2025
In a Fast Company article, Managing Principal and Protective Design and Security Practice Leader Peggy Phillips talks about how building owners, designers and tenants can take a proactive approach for creating workspaces that are both welcoming and safe.
Insight
When Lithium-Ion Batteries FailAugust 13, 2025
In a Parking Today Media article, Pawel Woelke, Peter Johnson and Juan G. Londono explore the science behind thermal runaway, the limitations of fire suppression strategies and the engineering challenges behind the rapidly evolving technology of lithium-ion batteries.
News
Key Insights for Facilities ManagersAugust 12, 2025
In a FacilitiesNet/NFMT article, Principal Elisa Paone and Senior Project Director Barbara Gao share practical strategies for assessing risk and developing a framework for building operational resilience.
News
Reflecting on Hurricane Katrina: 20 Years LaterAugust 04, 2025
The record-breaking 2005 hurricane season, with 27 named storms, highlighted the need for forensic analysis, and Katrina’s lessons continue to shape resilient design and coastal defenses, preparing communities for future climate-driven storms.
Insight
Why Implement Performance-Based Seismic Design?August 04, 2025
For projects of unconventional size, shape, structural system or function that are in high-seismic areas, meeting standard building codes alone may not always make sense. Performance-based seismic design (PBSD) can provide a better approach.
News
Karuruma Trail Bridge CompletedJuly 28, 2025
Thornton Tomasetti partnered with Bridges to Prosperity to construct a 60-meter trail bridge over the Akaruruma River in Rwanda, completed ahead of schedule. The bridge connects over 5,600 people across five communities to essential services, enhancing safety and livelihoods.
News
Preparing a Construction Site Ahead of a Major HurricaneJuly 01, 2025
Proper preparation can mitigate risks, protect valuable assets and ensure the safety of workers and surrounding communities.
We outline a comprehensive guide to securing your construction site ahead of a hurricane, drawing on our expertise in structural integrity and disaster resilience.
News
Athletics Break Ground on Las Vegas MLB BallparkJune 26, 2025
The new A’s Las Vegas ballpark has broken ground.
News
2025 Hurricane Season PreparationJune 01, 2025
Once again NOAA is predicting above-normal activity for the Atlantic hurricane season. We’ll delve into these predictions and offer some solutions on how best to prepare commercial and residential properties for before, during and after the storm.
News
Construction Underway On Karuruma Trail BridgeMay 22, 2025
Thornton Tomasetti volunteers are heading to Rwanda to help complete a 60-meter suspended bridge that will provide safe, year-round access for over 8,600 residents in two rural communities.
News
Mahan Named To ENR's National Top 20 Under 40May 22, 2025
Congratulations to Associate Jennifer Mahan on being named one of Engineering News-Record’s National Top 20 Under 40 for 2025.
News
Richard Tomasetti Participates In Skyscraper Museum PanelMarch 21, 2025
From the turn-of-the-century Ingalls Building in Cincinnati to the 1-kilometer Jeddah Tower now rising in Saudi Arabia, reinforced concrete has paved the way for architectural and engineering innovations.
News
Facility Executive: A Nearly Century Old Building Prepares For Its Next 100 YearsFebruary 27, 2025
A retrofit program involving the conversion of the nearly 100-year-old 345 Hudson’s mechanical systems with an innovative all-electric network and a novel system design at the adjacent 555 Greenwich enable both buildings to use less energy than traditional buildings.
News
Roger Weld Joins The Transportation TeamJanuary 23, 2025
Roger, who has more than 30 years of experience in the planning and design of efficient and sustainable infrastructure and public spaces, recently joined our Transportation practice in New York.
News
Bob Smilowitz Recognized With ASCE AwardJanuary 08, 2025
Congratulations to Bob Smilowitz, who is the latest recipient of the American Society of Civil Engineers’ Ernest E. Howard Award. The award recognizes an ASCE member for their contributions in advancing the field of structural engineering.
News
Design Revealed for New Metropolitan Museum WingDecember 11, 2024
The five-story, 126,000-square-foot wing will preserve the building’s historical footprint and honor the museum’s architectural legacy while addressing sustainability, accessibility and infrastructure improvements.
News
Revitalization Efforts For Two New York City ClassicsNovember 20, 2024
There’s always room for improvement, even for landmark structures. The latest issue of the Steel Institute of New York’s Metals in Construction magazine looks at revitalization projects at two New York City classics.
Insight
Here's How, Embodied Carbon: 12 Minutes on Climate Action in EngineeringNovember 12, 2024
With the building sector contributing up to 40% of greenhouse gas emissions, designers have a responsibility to act to combat the negative impacts of climate change.
Insight
Here's How, Embodied Carbon: 13 Minutes on Ethical DecarbonizationNovember 07, 2024
The decisions designers make have a wide-reaching impact, including across supply chains, on the project's construction team and its end users.
Insight
Here's How, Embodied Carbon: 15 Minutes on The Structural Engineer’s InfluenceOctober 23, 2024
From schematic design to construction, structural engineers have many opportunities to reduce embodied carbon on building projects.
Insight
Here's How, Embodied Carbon: 12 Minutes on Extreme Carbon Reduction: A Case StudyOctober 08, 2024
When it comes to sustainability in building design, some projects go above and beyond. Our latest podcast looks at what it takes to achieve ambitious goals for embodied carbon reduction.
News
Samuel H. Scripps Theater Center Breaks GroundOctober 03, 2024
The curtain has gone up on a new, permanent home for Hudson Valley Shakespeare.
Insight
Here's How, Embodied Carbon: 9 Minutes on Higher Degrees of Sustainability on CampusesSeptember 25, 2024
Colleges and universities are often ahead of the curve when it comes to sustainability, as a growing number of institutions put greater emphasis on reducing embodied carbon, achieving net zero and decarbonizing the supply chain.
News
End of the Lull, Plus Storm-Tracking ResourcesSeptember 25, 2024
We experienced a brief lull in Atlantic hurricane activity in August, but it didn’t last long, as evidenced by the flooding brought by Hurricane Francine, and now Florida is bracing for Helene.
Insight
Here's How, Embodied Carbon: 11 Minutes on Embodied Carbon Reduction for BridgesSeptember 13, 2024
Infrastructure growth is a significant contributor to carbon emissions, but new policies and engineering innovation are leading to notable reductions.
News
Our Latest Corporate Responsibility ReportSeptember 12, 2024
Our corporate responsibility report is our annual communication of the firm's corporate responsibility targets and of progress towards our ESG (environmental, social and governance) goals.
News
Midpoint Update: 2024 Atlantic Hurricane SeasonAugust 20, 2024
Now that we’ve reached the midpoint of the 2024 Atlantic hurricane season with five named storms, let’s take a look at the impacts of a few of the most recent.
News
Makurungwe Trail Bridge RecapJuly 26, 2024
The completion of the Makurungwe Trail Bridge marks a transformative moment for the local communities, promising hope and connection.
Insight
Here's How, Embodied Carbon: 9 Minutes on Timber, Nature's Low Carbon MaterialJuly 23, 2024
Highly sustainable and visually appealing, mass timber continues to grow in popularity as the go-to building material, but not all timber is the same.
Insight
Here's How, Embodied Carbon: 12 Minutes on Technologies for Efficient Steel ProductionJuly 09, 2024
When it comes to producing more sustainable steel, it’s not just about recycling and efficient manufacturing processes. Alternative technologies can also help significantly lower its carbon footprint.
News
House of the Dragon Installation on the Empire State BuildingJune 28, 2024
King Kong isn’t the only huge beast to scale the iconic Empire State Building.
News
HRO Today: Engaging Men As AlliesJune 27, 2024
Vandana Juneja discusses the importance of male allies and five steps they can take to help foster greater gender parity and inclusion in the workplace.
Insight
Here's How, Embodied Carbon: 6 Minutes on Portland-Limestone CementJune 25, 2024
Hear why many markets are switching to portland-limestone cement which, with performance as good or better than traditional portland cement, can offer a 5-10% reduction in embodied carbon.
Insight
Here's How, Embodied Carbon: 11 Minutes on the LCA Three WaysJune 04, 2024
While key to evaluating the environmental impact of buildings, life cycle assessments can differ in their approaches and results.
News
Preparing for the 2024 Hurricane SeasonMay 31, 2024
As the 2024 Atlantic hurricane season begins, we look back at 2023 and share some tips for evaluating building safety ahead of what’s predicted to be a historically busy year.
Insight
Here's How, Embodied Carbon: 12 Minutes on the ABCs of EPDsMay 21, 2024
A life cycle assessment is key to evaluating the full environmental impact of a building or product, but what does it entail?
News
AP: NYC skyscrapers can withstand most earthquakesApril 09, 2024
While last Friday’s 4.8 magnitude earthquake left many in the metro New York area shaken, it had a negligible effect on the city’s skyscrapers.
Insight
Climate Action: Nature-Based SolutionsJanuary 18, 2024
Utilizing systems like green space and natural floodplains, nature-based solutions improve biodiversity, occupant health and aesthetics.
Insight
Energy Supply and Carbon CaptureNovember 08, 2023
While fossil fuels continue to account for more than half of U.S. power production, CCUS can serve as a bridge technology helping us move toward decarbonization.
Insight
Climate Risk AssessmentsNovember 01, 2023
Climate risk assessments are an important early step in identifying site-specific climate hazards and how those hazards may change over the lifespan of a building.
Insight
Resilience Master PlanningOctober 25, 2023
Resilience Master Planning goes beyond designing a single building, bridge, or infrastructure system and seeks to foster entire communities at different scales.
Insight
Operational and Embodied CarbonOctober 17, 2023
Decarbonization of the built environment requires a whole-life carbon approach - the combination of operational and embodied carbon.
News
Emergency PreparednessOctober 12, 2023
Emergency planning and preparedness may often come as an afterthought, but it is crucial to take a proactive approach that incorporates operations and maintenance considerations into early project stages.
Insight
Energy Supply and Renewables & BatteriesOctober 04, 2023
Renewables or renewable energy sources are key to the energy transition, not only because they reduce our dependency on finite and high-GHG-emitting sources (i.e., fossil fuels), but also because they leverage clean, naturally derived sources that replenish at a higher rate than they are consumed.
News
Corporate Climate ActionSeptember 26, 2023
We aspire to be one of the most sustainable firms, both in the way we design our projects and in how we operate as a responsible business.
News
Roundtable: Decarbonizing Today for Tomorrow's World, and...June 22, 2023
What does decarbonization entail and what does its future look like?
News
Arecibo Collapse Forensic Report ReleasedAugust 11, 2022
It took just seconds for the 900-ton instrument platform at the Arecibo Observatory in Puerto Rico to come crashing down into the 305-meter-wide dish, destroying the iconic radio telescope.
News
Back to the Great IndoorsJuly 06, 2021
As people start settling into our new headquarters, they can do so with confidence, knowing that the space carries the International WELL Building Institute’s WELL Health-Safety Rating.
News
2020 Showcase: Responding to the PandemicMay 09, 2021
When COVID-19 cases surged in the spring of 2020, and again last winter, our engineers, scientists and programmers lent a hand. Here are a few of the ways we helped our clients and communities meet some immediate challenges.
News
Stepping Closer to our Carbon Reduction GoalsMay 05, 2021
Our offices saw a significant drop in greenhouse gas emissions, due in part to the global pandemic.
News
2019 Green Offices UpdateJuly 27, 2020
In 2019, 87 employees – representing all but our smallest offices – served as local corporate responsibility advocates.