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' 40-27 BUILDING METAL FABRICATIONS <br />BRPH ARCHITECTS -ENGINEERS, INC. <br />E. Weld corners and seams continuously to comply with the following: <br />1. Use materials and methods that minimize distortion and develop strength and <br />corrosion resistance of base metals. <br />2. Obtain fusion without undercut or overlap. <br />' 3. Remove welding flux immediately. <br />4. At exposed connections, finish exposed welds and surfaces smooth and blended <br />so no roughness shows after finishing. <br />F. Form exposed connections with hairline joints, flush and smooth, using concealed <br />fasteners or welds where possible. Where exposed fasteners are required, use Phillips <br />flat -head (countersunk) fasteners unless otherwise indicated. Locate joints where least <br />tconspicuous. <br />G. Fabricate seams and other connections that will be exposed to weather in a manner to <br />exclude water. Provide weep holes where water may accumulate. <br />H. Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish hardware, <br />' screws, and similar items. <br />I. Provide for anchorage of type indicated; coordinate with supporting structure. Space <br />anchoring devices to secure metal fabrications rigidly in place and to support indicated <br />loads. <br />' 2.7 MISCELLANEOUS FRAMING AND SUPPORTS <br />A. General: Provide steel framing and supports not specified in other Sections as needed <br />to complete the Work. <br />B. Fabricate units from steel shapes, plates, and bars of welded construction unless <br />otherwise indicated. Fabricate to sizes, shapes, and profiles indicated and as <br />necessary to receive adjacent construction. <br />1. Fabricate units from slotted channel framing where indicated. <br />C. Galvanize miscellaneous framing and supports where indicated. <br />2.8 METAL LADDERS <br />A. General: <br />1. Comply with ANSI A14.3 unless otherwise indicated. <br />2. Elevator pit ladders will be provided by the elevator manufacturer. <br />Fixed Vertical Steel Ladders at utility tunnel egress hatches: <br />1. Space siderails 16" apart unless otherwise indicated. <br />2. Siderails: Continuous, 1/2-by-2-1/2-inch steel flat bars, with eased edges. <br />3. Rungs: 3/4-inch-diameter steel bars. <br />4. Fit rungs in centerline of siderails; plug -weld and grind smooth on outer rail faces. <br />C06922.001.00 05 50 00 - 5 <br />1 05-22-14 <br />