SU0005041 - Laserfiche WebLink

Home Browse Search

v Patterson Pass Business Center, Building#6 Page 2 Tracy, California SECTION 2: STRUCTURAL SYSTEMS STRUCTURAL FRAMING Original construction drawings were not available for review. The descriptions of the structural systems and the design review are based on the site observation and our familiarity with and knowledge of the type of structure. Foundation The foundation is assumed to consist of shallow pad footings at each panel joint and at each interior column. The footings at adjacent buildings were designed using an allowable soil bearing pressure of 2,000 pounds per square foot (psf) in accordance with recommendations provided in a site-specific soils investigation report. The first floor of the building is a concrete slab-on-grade. The slabs at adjacent buildings were specified to be placed over a six-inch-thick Class II rock base and 18 inches of compacted fill. Slabs at adjacent buildings are reinforced with '/-inch-diameter reinforcing bars spaced at 24 inches on center placed at mid-depth of the slabs. Roof Framing The roof is framed with '/-inch-thick oriented strand board (OSB) sheathing spanning between 2 x 6 sawn lumber sub-purlins spaced at 24 inches on center. The sub-purlins span ten feet between pre-manufactured open-web steel joists that are supported by pre-manufactured steel truss girders. Steel tube columns support the truss girders. Steel channel and angle ledgers bolted to the concrete wall panels provide support for the roof members that frame into the concrete walls. Structural Walls The exterior walls of the building are concrete panels that were cast on the floor slab and lifted into place. The typical eight-inch-thick wall panel is assumed to be reinforced with a single curtain of reinforcing steel placed at mid-depth of the panel. Added reinforcing is assumed to have been specified at openings and at short piers. 05005.01 R. D. Boyens Engineering