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Gateway Park Center PERKINS+WILL <br /> 810495.000 <br /> 12/06/18 <br /> <br /> <br />HOLLOW METAL DOORS AND FRAMES <br /> 08 11 13 - 4 <br /> <br /> <br />G. Bituminous Coating: Cold-applied asphalt mastic, compounded for 15-mil dry film <br />thickness per coat. Provide inert-type noncorrosive compound free of asbestos <br />fibers, sulfur components, and other deleterious impurities. <br />2.6 FABRICATION <br />A. Fabricate hollow-metal work to be rigid and free of defects, warp, or buckle. <br />Accurately form metal to required sizes and profiles, with minimum radius for metal <br />thickness. Where practical, fit and assemble units in manufacturer's plant. To <br />ensure proper assembly at Project site, clearly identify work that cannot be <br />permanently factory assembled before shipment. <br />B. Hollow-Metal Doors: <br />1. Steel-Stiffened Door Cores: Provide minimum thickness 0.026 inch, steel <br />vertical stiffeners of same material as face sheets extending full -door height, <br />with vertical webs spaced not more than 6 inches apart. Spot weld to face <br />sheets no more than 5 inches o.c. Fill spaces between stiffeners with glass- or <br />mineral-fiber insulation. <br />2. Vertical Edges for Single-Acting Doors: Bevel edges 1/8 inch in 2 inches. <br />3. Top Edge Closures: Close top edges of doors with flush closures of same <br />material as face sheets. <br />4. Bottom Edge Closures: Close bottom edges of doors with end closures or <br />channels of same material as face sheets. <br />C. Hollow-Metal Frames: Where frames are fabricated in sections due to shipping or <br />handling limitations, provide ali gnment plates or angles at each joint, fabricated of <br />same thickness metal as frames. <br />1. Frames: Provide closed tubular members with no visible face seams or joints, <br />fabricated from same material as door frame. Fasten members at crossings <br />and to jambs by butt welding. <br />2. Provide countersunk, flat- or oval-head exposed screws and bolts for exposed <br />fasteners unless otherwise indicated. <br />3. Floor Anchors: Weld anchors to bottoms of jambs with at least four spot welds <br />per anchor; however, for slip-on drywall frames, provide anchor clips or <br />countersunk holes at bottoms of jambs. <br />4. Jamb Anchors: Provide number and spacing of anchors as follows: <br />a. Masonry Type: Locate anchors not more than 16 inches from top and <br />bottom of frame. Space anchors not more than 32 inches o.c., to match <br />coursing, and as follows: <br />1) Three anchors per jamb from 60 to 90 inches high. <br />b. Stud-Wall Type: Locate anchors not more than 18 inches from top and <br />bottom of frame. Space anchors not more than 32 inches o.c. and as <br />follows: <br />1) Four anchors per jamb from 60 to 90 inches high. <br />c. Compression Type: Not less than two anchors in each frame.