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CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12, 2020 <br />308 WEST FRANKLIN, CHAPEL HILL, NC <br /> <br />HOLLOW METAL DOORS AND FRAMES 081113 - 8 <br />3.2 PREPARATION <br />A. Remove welded-in shipping spreaders installed at factory. Restore exposed finish by grinding, <br />filling, and dressing, as required to make repaired area smooth, flush, and invisible on exposed <br />faces. <br />B. Prior to installation, adjust and securely brace welded hollow metal frames for squareness, <br />alignment, twist, and plumbness to the following tolerances: <br />1. Squareness: Plus or minus 1/16 inch (1.6 mm), measured at door rabbet on a line 90 <br />degrees from jamb perpendicular to frame head. <br />2. Alignment: Plus or minus 1/16 inch (1.6 mm), measured at jambs on a horizontal line <br />parallel to plane of wall. <br />3. Twist: Plus or minus 1/16 inch (1.6 mm), measured at opposite face corners of jambs on <br />parallel lines, and perpendicular to plane of wall. <br />4. Plumbness: Plus or minus 1/16 inch (1.6 mm), measured at jambs on a perpendicular line <br />from head to floor. <br />C. Drill and tap doors and frames to receive nontemplated, mortised, and surface-mounted door <br />hardware. <br />3.3 INSTALLATION <br />A. General: Install hollow metal work plumb, rigid, properly aligned, and securely fastened in <br />place; comply with Drawings and manufacturer's written instructions. <br />B. Hollow Metal Frames: Install hollow metal frames of size and profile indicated. Comply with <br />[ANSI/SDI A250.11] [HMMA 840]. <br />1. Set frames accurately in position, plumbed, aligned, and braced securely until permanent <br />anchors are set. After wall construction is complete, remove temporary braces, leaving <br />surfaces smooth and undamaged. <br />a. At fire-protection-rated openings, install frames according to NFPA 80. <br />b. Where frames are fabricated in sections because of shipping or handling <br />limitations, field splice at approved locations by welding face joint continuously; <br />grind, fill, dress, and make splice smooth, flush, and invisible on exposed faces. <br />c. Install frames with removable glazing stops located on secure side of opening. <br />d. Install door silencers in frames before grouting. <br />e. Remove temporary braces necessary for installation only after frames have been <br />properly set and secured. <br />f. Check plumbness, squareness, and twist of frames as walls are constructed. Shim <br />as necessary to comply with installation tolerances. <br />g. Field apply bituminous coating to backs of frames that are filled with grout <br />containing antifreezing agents. <br />2. Floor Anchors: Provide floor anchors for each jamb and mullion that extends to floor, <br />and secure with postinstalled expansion anchors. <br />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2