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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 - 9 <br />a. Floor anchors may be set with powder-actuated fasteners instead of postinstalled <br />expansion anchors if so indicated and approved on Shop Drawings. <br />3. Metal-Stud Partitions: Solidly pack mineral-fiber insulation behind frames. <br />4. Masonry Walls: Coordinate installation of frames to allow for solidly filling space <br />between frames and masonry with grout. <br />5. Concrete Walls: Solidly fill space between frames and concrete with grout. Take <br />precautions, including bracing frames, to ensure that frames are not deformed or damaged <br />by grout forces. <br />6. In-Place Concrete or Masonry Construction: Secure frames in place with postinstalled <br />expansion anchors. Countersink anchors, and fill and make smooth, flush, and invisible <br />on exposed faces. <br />7. In-Place Gypsum Board Partitions: Secure frames in place with postinstalled expansion <br />anchors through floor anchors at each jamb. Countersink anchors, and fill and make <br />smooth, flush, and invisible on exposed faces. <br />8. Ceiling Struts: Extend struts vertically from top of frame at each jamb to overhead <br />structural supports or substrates above frame unless frame is anchored to masonry or to <br />other structural support at each jamb. Bend top of struts to provide flush contact for <br />securing to supporting construction. Provide adjustable wedged or bolted anchorage to <br />frame jamb members. <br />9. Installation Tolerances: Adjust hollow metal door frames for squareness, alignment, <br />twist, and plumb to the following tolerances: <br />a. Squareness: Plus or minus 1/16 inch (1.6 mm), measured at door rabbet on a line <br />90 degrees from jamb perpendicular to frame head. <br />b. Alignment: Plus or minus 1/16 inch (1.6 mm), measured at jambs on a horizontal <br />line parallel to plane of wall. <br />c. Twist: Plus or minus 1/16 inch (1.6 mm), measured at opposite face corners of <br />jambs on parallel lines, and perpendicular to plane of wall. <br />d. Plumbness: Plus or minus 1/16 inch (1.6 mm), measured at jambs at floor. <br />3.4 ADJUSTING AND CLEANING <br />A. Final Adjustments: Check and readjust operating hardware items immediately before final <br />inspection. Leave work in complete and proper operating condition. Remove and replace <br />defective work, including hollow metal work that is warped, bowed, or otherwise unacceptable. <br />B. Remove grout and other bonding material from hollow metal work immediately after <br />installation. <br />C. Prime-Coat Touchup: Immediately after erection, sand smooth rusted or damaged areas of <br />prime coat and apply touchup of compatible air-drying, rust-inhibitive primer. <br />D. Metallic-Coated Surfaces: Clean abraded areas and repair with galvanizing repair paint <br />according to manufacturer's written instructions. <br />END OF SECTION 081113 <br />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2