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f , t SLABS ON GRADE All slabs on grade, unless otherwise noted, shall be 4"thick with 6x6-W1.4xW1.4 WWF centered in slab. POURED CONCRETE WALLS Unless otherwise noted on plans or sections, reinforce poured concrete walls with#5 verticals at 18" on center inside face and#5 horizontals at 24" on center inside face. Provide#5 x 4'-0" (2'-0" each leg)corner bars at 24" on center, horizontal reinforcing, at corner of wall with 3-#5 vertical support bars. All wall openings larger than 12" shall have 2-#5 all sides of openings. Extend reinforcing 2'-0" beyond each edge of opening. Wall reinforcing is continuous through columns. PRECAST CONCRETE UNITS The design of all precast concrete units shall conform to A.C.I. 318-83. Prestress units must sustain the loads indicated in addition to all other dead loads. Plank shall be prestressed hollow- core slabs, proportioned for the loads noted on the drawings. Upon installation, plank shall be essentially past the effects of deformation due to creep, and shall have camber not over L/360 of the span. Such camber shall be uniform from plank to plank. All headers at openings in precast shall be furnished by the precast supplier. Place mechanical openings, not shown on plans, between webs in the precast plank units. Submit complete shop drawings to architect for approval, showing the erection plan, all bearing conditions, and anchorage details. Calculations certified by a professional engineer will be required for precast units and anchorages. STRUCTURAL STEEL All structural steel shall be designed, fabricated and erected according to the American Institute of Steel Construction (A.I.S.C.) standard specifications. Structural steel supplier shall supply all cap plates, bearing assemblies, base plates, stiffeners, splices, connections and shall design same unless noted on drawings. All welding shall be done using the shielded arc process using E70 electrodes in accordance with the rules of the American Welding Society (A.W.S.) Structural Welding Code. All welders shall be certified using the rules of the American Welding Society. CONCRETE COVER ON REINFORCING Footings 3" clear bottom and sides Walis 1'/z" clear inside face Slab on Grade Center reinforcing in slab CONCRETE TOPPING Unless otherwise noted, center 6x6-W1.4xW1.4 WWF in all concrete topping slabs.