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DSS Skills Development Center Smith Sinnett / 2020045 <br />Chapel Hill, North Carolina Orange County <br /> <br />HOLLOW METAL DOORS AND FRAMES 08 11 13 - 4 <br />2.7 FABRICATION <br />A. Fabricate hollow metal work to be rigid and free of defects, warp, or buckle. Accurately form metal to <br />required sizes and profiles, with minimum radius for thickness of metal. Where practical, fit and <br />assemble units in manufacturer's plant. To ensure proper assembly at Project site, clearly identify work <br />that cannot be permanently factory assembled before shipment. <br />B. Tolerances: Fabricate hollow metal work to tolerances indicated in SDI 117. <br />C. Hollow Metal Frames: Where frames are fabricated in sections due to shipping or handling limitations, <br />provide alignment plates or angles at each joint, fabricated of same thickness metal as frames. <br />1. Welded Frames: Weld flush face joints continuously; grind, fill, dress, and make smooth, flush, <br />and invisible. <br />2. Sidelight and Transom Bar Frames: Provide closed tubular members with no visible face seams or <br />joints, fabricated from same material as door frame. Fasten members at crossings and to jambs by <br />butt welding. <br />3. Provide countersunk, flat- or oval-head exposed screws and bolts for exposed fasteners unless <br />otherwise indicated. <br />4. Floor Anchors: Weld anchors to bottom of jambs and mullions with at least four spot welds per <br />anchor. <br />5. Jamb Anchors: Provide number and spacing of anchors as follows: <br /> <br />a. Stud-Wall Type: Locate anchors not more than 18 inches (457 mm) from top and bottom <br />of frame. Space anchors not more than 32 inches (813 mm) o.c. and as follows: <br />1) Three anchors per jamb up to 60 inches (1524 mm) high. <br />2) Four anchors per jamb from 60 to 90 inches (1524 to 2286 mm) high. <br />3) Five anchors per jamb from 90 to 96 inches (2286 to 2438 mm) high. <br />4) Five anchors per jamb plus 1 additional anchor per jamb for each 24 inches (610 <br />mm) or fraction thereof above 96 inches (2438 mm) high. <br />5) Two anchors per head for frames above 42 inches (1066 mm) wide and mounted in <br />metal-stud partitions. <br /> <br />6. Door Silencers: Except on weather-stripped doors, drill stops to receive door silencers as follows. <br />Keep holes clear during construction. <br />a. Single-Door Frames: Drill stop in strike jamb to receive three door silencers. <br />b. Double-Door Frames: Drill stop in head jamb to receive two door silencers. <br />D. Fabricate concealed stiffeners, edge channels, and hardware reinforcement from either cold- or hot-rolled <br />steel sheet. <br />E. Hardware Preparation: Factory prepare hollow metal work to receive templated mortised and concealed <br />hardware; include cutouts, reinforcement, mortising, drilling, and tapping according to the Door <br />Hardware Schedule and templates furnished as specified in Division 08 Section "Door Hardware." <br />1. Comply with applicable requirements in ANSI/SDI A250.6 and ANSI/DHI A115 Series <br />specifications for preparation of hollow metal work for hardware. <br />2. Coordinate locations of conduit and wiring boxes for electrical connections with Division 26 <br />Sections. <br />F. Stops and Moldings: Provide stops and moldings around glazed lites where indicated. Form corners of <br />stops and moldings with butted or mitered hairline joints. Minimum 0.0359-inch- thick steel or 0.040- <br />inch- thick aluminum. <br />1. Single Glazed Lites: Provide fixed stops and moldings welded on secure side of hollow metal <br />work. <br />2. Multiple Glazed Lites: Provide fixed and removable stops and moldings so that each glazed lite is <br />capable of being removed independently. <br />DocuSign Envelope ID: ECCAC5A0-6CC8-4B37-8AD3-89D69F0AE1AE