Hard Rock Stadium Shade Canopy Erection Plan, Miami Gardens, Fla. Photo: Hillsdale Fabricators
tion’s new $12 million, 67,000-square-foot Tipping and Transfer Building superstructure was designed by a structural engineering part- nership between Integrated Design Engineers and CDM Smith. The building is used to collect and sort waste destined for landfill using the flat-floor unloading and sorting method, and is equipped with noise and odor reducers and a mist sprayer that reduces dust. A 150kW solar array and a green roof covers 80 percent of the building’s roof area. The building’s lower-level southwest corner had to be clear of columns and walls to allow truck entrance into the building after driving down the ramp from the street. In addition, the upper-level of the building had to be column-free for its full 200-foot span. A solution called the “floating corner” comprises a 50-foot cantilever truss and a 120-foot main transfer truss system that supports the weight of the entire build- ing at its southwest corner. The main transfer truss at the south face is supported by a double W30 beam embedded in the concrete slab on the east, and a full-story cantilever truss on the west. The full-story truss depth was selected to optimize the structural weight and allow top and bottom chord stabilization. The complexity of these trusses lies in the multiple-stage camber that ensures the trusses are at the correct elevations when the building is completed and loadings applied, as any unpredicted deflection would impact the building’s tri-chorded roof
trusses. The upper level of the building had to allow for a 200-foot span of open space without exceeding a roof structure depth of 7 feet (a span-to-depth ratio of L/28). Merit Award: Riggs CAT Headquarters, Little Rock, Ark. — The new headquarters’ most defining feature is a large western-facing porch. Its cantilevered tapered ends are capped with a standard galvanized steel grate cornice that lightens the edge, filters sunlight, and emulates a shovel blade lifted in the air. The new building’s 163-ton steel structure acts as a large open shed, sheltering key programmatic elements while creating two distinct display (public) and activity (private) lawns. A southern roof overhang and galvanized grate balcony shield direct sunlight but allow indirect light, a key sustainable strategy. Structural engineer is Bernhard TME, Little Rock, Ark. Presidential Award of Excellence in Engineering Promedica Corporate Headquarters, Toledo, Ohio — ProMedica Headquarters is an adaptive reuse of two buildings: the historic Daniel Burnham-designed steam plant constructed in 1896 as well as a Bru- talist bank building, both of which are sited adjacent to Promenade Park on the Maumee River at the heart of downtown Toledo. Trans-
34
csengineermag.com
june 2018
Made with FlippingBook Annual report