Infrastructure & Transportation
Structural steel detailing for the reinforcement of historic roof trusses supporting a new skylight.
Project overview
Moynihan Train Hall transformed the landmark James A. Farley Post Office Building into a 255,000-square-foot extension of New York Penn Station.
At the center of the project are three original 150-foot-long steel trusses that once supported the roof of the building’s mail hall.
Working for L&M Fabrication and Machine, our team provided steel detailing for an approximately 295-ton reinforcement package to support the roof trusses with the added load of the new skylight roof.
Approx. 295
Tons detailed
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Model to field
01 / Coordinated model
02 / Fabrication & fieldTechnical challenges
The new reinforcement had to fit around the original rivet heads and connection geometry. Detailing these interfaces required careful consideration of the existing steelwork to avoid conflicts between new and original components.
The reinforcement included built-up box sections, requiring precise detailing of their component geometry and connections to the existing trusses.
