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<br />Copyright 2002 AlA <br /> <br />MASTERSPEC Short Form <br /> <br />02/02 (R 05/06) <br /> <br />1. [Available ]Manufacturers: <br /> <br />a. ACL Industries, Inc. <br />b. American Safety Tread Co., Inc. <br />c. Amstep Products. <br />d. Armstrong Products, Inc. <br />e. Balco Inc. <br />f. Granite State Casting Co. <br />g. Wooster Products Inc. <br />h. <Insert manufacturer's name.> <br /> <br />2. Provide ribbed units, with abrasive filler strips projecting 1/16 inch (1.5 mm) above <br />aluminum extrusion. <br />3. Provide solid-abrasive-type units without ribs. <br />4. Apply clear lacquer to concealed bottoms, sides, and edges of units set into concrete. <br /> <br />C. Fasteners: Provide zinc-plated fasteners with coating complying with ASTM B 633, <br />Class Fe/Zn 25 for exterior use, and Class Fe/Zn 5 where built into exterior walls. <br /> <br />D. Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer <br />complying with MPI#79. <br /> <br />E. Concrete Materials and Properties: Comply with requirements in Division 3 Section "Cast-in- <br />Place Concrete" for normal-weight, air-entrained, ready-mix concrete with a minimum 28-day <br />compressive strength of 3000 psi (20 MPa), unless otherwise indicated. <br /> <br />F. Welded Wire Fabric: ASTM A 185, 6 by 6 inches (152 by 152 nml)--W1.4 by Wl.4, unless <br />otherwise indicated. <br /> <br />G. Precast Concrete Treads: Comply with requirements in Division 3 Section "Cast-in-Place <br />Concrete" for normal-weight concrete with a minimum 28-day compressive strength of 5000 psi <br />(35 MPa) and a total air content of not less than 4 percent or more than 6 percent. Reinforce <br />with galvanized, welded wire fabric, 2 by 2 inches (50 by 50 nun) by 0.062-inch- (l.6-nnn-) <br />diameter wire. <br /> <br />2.4 FABRICATION <br /> <br />A. [ Available ]Manufacturers: <br /> <br />1. Alfab, Inc. <br />2. American Stair, Inc. <br />3. Sharon Companies Ltd. (The). <br />4. <Insert manufacturer's name.> <br /> <br />B. Provide complete stair assemblies, including metal framing, hangers, struts,[ railings,] clips, <br />brackets, bearing plates, and other components necessary to support and anchor stairs and <br />platforms on supporting structure. <br /> <br />1. Join components by welding, unless otherwise indicated. Use materials and methods that <br />minimize distortion and develop strength and corrosion resistance of base metals. Obtain <br /> <br />METAL STAIRS <br /> <br />05511 - 4 <br />