11 Times Square Proskauer Rose Fit-Out in Manhattan. Ed Eckstein photo.

Eleven Times Square Proskauer Rose Fit-Out



Thornton Tomasetti provided structural design services for the tenant fit-out of floors 17 through 30 at Eleven Times Square. Thornton Tomasetti also served as the structural engineer for the 630-foot 975,000-square-foot office tower.

Scope of work was a typical office fit-out on 12 of the 14 floors and included a review and reinforcement for heavy loading in localized areas for libraries, case rooms, and will vaults. Additionally, Thornton Tomasetti provided design for the support of five Skyfold brand moveable partitions. The team also reviewed existing structural framing plans and performed field investigation of existing conditions. The two atypical floors were converted into a conference center and cafeteria space, requiring the floor framing to be reinforced for a 100 psf live load.

Plans called for a unique glass stair with a new double-height opening between the 27th and 28th floors. The solution to the client’s challenging design was a double cantilever staircase anchored at the top and bottom, requiring no support under the landings. Further modeling studies allowed the translucent glass treads, landings and handrails to act as stiffening agents without resorting to secondary steel elements. Thornton Tomasetti designed independent support for the stair and curtain wall creating the desired floating effect.

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