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The Surf Club – South Tower

Surfside, Florida •  4th Floor Sky Mat Design at the Residential Hotel South Tower

Set to open in spring 2016, Residential & Hotel South Tower at The Surf Club features a 12-story hotel tower with 80 rooms and a 12-story residential tower with 150 condominiums including 12 penthouses. The hotel and residential development also will have a private club, two restaurants, four swimming pools, and a spa and fitness center. The hotel frame sits on top of a 4 to 6 foot deep post-tensioned concrete cantilever transfer slab, also called “Sky Mat,” located at the 4th floor of the tower.

KEC’s primary objective was to design the structural transfer slab to support 9 concrete floors including the roof mainly relying on a large concrete column for support.  As part of the design process, KEC developed a 3D finite element model of the transfer slab to analyze and design it. The transfer slab was designed as a two way post-tensioned slab with bonded tendons of 37 - 0.62” diameter strands. Due to the large shear demand in the Sky Mat, a set of virtual beams or spines in the form of post-tensioning bars were added to direct shear to its main column support.