New U.S. Federal Courthouse

The Hinman Consulting Engineers was responsible for providing blast mitigating analysis and design input to the design team for this new $300 million, 490,000-s.f. federal courthouse. Our role in this project involved implementing the Interagency Security Committee (ISC) Security Design Criteria to provide a medium level of protection facility spanning from Concepts through development of Design Build Bridging documents.

Hinman initiated key strategies that were implemented, including bringing the lobby out of the main building footprint in order to protect primary building columns.

Our involvement specifically included participating in building and site planning, design of perimeter protection, structural and exterior envelope analysis and design for air-blast loading including slabs, beams, girders, columns, walls, windows, glazing and curtain wall systems. Building space planning concerns included providing a separation of high risk areas to occupied spaces and critical utilities. This was especially critical given the high rise construction with underground parking. Hinman initiated key strategies that were implemented, including bringing the lobby out of the main building footprint in order to protect primary building columns. Where columns were exposed to a potential weapon in the parking garage they were either protected by hardened partition wall construction or analyzed and designed to withstand air-blast loading.

Another challenge was working within the goals of providing a LEED silver rated building and the implementation of sustainable design strategies. One of these design elements included the addition of a number of sunshade elements throughout the building façade of which many were of terra cotta construction. Hinman’s main challenge was working closely with the architect and curtain wall consultant to provide a substrate and support structure with the strength and stiffness to limit flying debris by these brittle, heavy elements.