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This bracing is known by many names such as herringbone strutting, blocking, bridging, and dwanging. Cross bracing on a bridge tower. In construction, cross bracing is a system utilized to reinforce building structures in which diagonal supports intersect. Cross bracing is usually seen with two diagonal supports placed in an X-shaped manner.
Three major components of a BRB that can be distinguished are its steel core, its bond-preventing layer, and its casing. The steel core is designed to resist the full axial tension force developed in the bracing. Its cross-sectional area can be significantly lower than that of regular braces, since its performance is not limited by buckling.
Grasshopper and Rhinoceros 3D were used to model the structure prior to construction. [1] Components that make up the structure of the building include framed glue-laminated beams on steel columns with cross-bracing, exposed structural concrete flooring, and a Canam metal deck roofing system. [2]
The cross-section is slightly more than a semi-circle so that the bottom of the hut curves inwards slightly. The exterior is formed from curved corrugated steel sheets 10 feet 6 inches (320 cm) by 2 feet 2 inches (66 cm), laid with a two-corrugation lap at the side and a 6-inch (15 cm) overlap at the ends. Three sheets cover the arc of the hut.
The intervals for the blocks are specified in the building code or as calculated by a structural engineer. Blocking also resists the rotational movement, or twisting, of floor joists as they deflect under load. This may take the form of diagonal cross bracing, or herringbone, bracing between floor joists.
The collapse happened about 5 p.m. at a structure where a rigid steel frame had been erected at Boise Airport, Boise Fire Operations Chief Aaron Hummel told reporters.