Wells Fargo Center Expansion


Pittsburgh City Center

Golden Triangle, Pittsburgh, PA

Pittsburgh City Center was a 5,000,000 SF mixed use development proposed for a three-city block area near the tip of Pittsburgh’s Golden Triangle.


The design team faced a number of challenging  requirements: Three proposed office towers were proposed to be constructed in separate phases over a retail base and structured parking levels, all over a functioning subway terminal, each of which had distinct requirements for structural spans.


The engineering solution devised by Shankar Nair of the RTKL team proposed a composite system consisting of a concrete base allowing for sophisticated transfers to accommodate changing structural spans and facilitate construction over the subway. This system terminated with a diaphragm at the top mechanical level, from which the steel office tower elements would be constructed.


The project, for developer Mosbacher Jacobs Properties (Robert Mosbacher, U.S. Secretary of Commerce) was not constructed, however the structural design has been featured in Engineering News Record as well as  in a number of other professional journals and technical papers presented by Dr. Nair. As a senior Associate for RTKL Associates Robert DeHaven led a studio team responsible for office elements of the project, with coordination of other project elements.