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Gilpin County Recreation Center 

The challenges of the Rec Center included 120 mph winds, 90 psf snow loads, 92 foot clear roof spans, flat but sloping roof structure, and tall spaces.

It was a pleasure to work with the steel joist and precast manufacturers during design to achieve economical construction and good detailing. We learned the value of building the coordinated input of specialty contractors into the construction documents and to detail thoroughly.

The roof slope was built into the joists while incorporating a "mansard" shape, which made shear transfer to the perimeter shear walls and out of plane bracing of those walls to the roof diaphragms very challenging from a detailing perspective. The complex roof also offered very critical dimensioning issues. Review of bar joist and structural steel shop drawings was intensive, where dimensions were critical and our accurate cadd drafting practices were useful in checking and providing dimensional information to the fabricators. The tall exterior walls, up to 36 feet unbraced, were constructed with an ICF narrow wall cavity, requiring three dimensional finite element modeling and design to optimize reinforcing steel. Precast was used to good advantage for architectural trusses and exterior piers, and actually achieved very aesthetic results from a structural cast.

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A 45,000 SF facility, it houses an Olympic swimming pool, large recreational pool and slide, gymnasium, suspended running track, exercise areas, craft areas, administrative offices, and multi-purpose areas.

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Precast architectural trusses