length to secure to framing, spaced 300 mm (12 inches) on center in field and along edges. 3. Where coreboard is covered with face layer of gypsum board, stagger joints of face layer from those in the coreboard base. E. Treat joints, corners, and fasteners in face layer as specified for finishing of gypsum board. F. Elevator Shafts: 1. Protrusions including fasteners other than flange of shaft wall framing system or offsets from vertical alignments more than 3 mm (1/8-inch) are not permitted unless shown. 2. Align shaft walls for plumb vertical flush alignment from top to bottom of shaft. 3.5 FINISHING OF GYPSUM BOARD A. Finish joints, edges, corners, and fastener heads in accordance with ASTM C840. Use Level 4 finish for al finished areas open to public view. B. Before proceeding with installation of finishing materials, assure the following: 1. Gypsum board is fastened and held close to framing or furring. 2. Fastening in gypsum board are slightly below surface in dimple formed by driving tool. C. Finish joints, fasteners, and all openings, including openings around penetrations, on that part of the gypsum board extending above suspended ceilings to seal surface of non decorated // smoke barrier, // fire rated // and sound rated // and sound rated // gypsum board construction. After the installation of hanger rods, hanger wires, supports, equipment, conduits, piping and similar work, seal remaining openings and maintain the integrity of the // smoke barrier, // fire rated // and sound rated // construction/ Sanding is not required of non decorated surfaces. 3.6 REPAIRS A. After taping and finishing has been completed, and before decoration, repair all damaged and defective work, including nondecorated surfaces. B. Patch holes or openings 13 mm (1/2 inch) or less in diameter, or equivalent size, with a setting type finishing compound or patching plaster. C. Repair holes or openings over 13 mm (1/2 inch) diameter, or equivalent size, with 16 mm (5/8 inch) thick gypsum board secured in such a manner as to provide solid substrate equivalent to undamaged surface.
length to secure to framing, spaced 300 mm (12 inches) on center in field and along edges. 3. Where coreboard is covered with face layer of gypsum board, stagger joints of face layer from those in the coreboard base. E. Treat joints, corners, and fasteners in face layer as specified for finishing of gypsum board. F. Elevator Shafts: 1. Protrusions including fasteners other than flange of shaft wall framing system or offsets from vertical alignments more than 3 mm (1/8-inch) are not permitted unless shown. 2. Align shaft walls for plumb vertical flush alignment from top to bottom of shaft. 3.5 FINISHING OF GYPSUM BOARD A. Finish joints, edges, corners, and fastener heads in accordance with ASTM C840. Use Level 4 finish for al finished areas open to public view. B. Before proceeding with installation of finishing materials, assure the following: 1. Gypsum board is fastened and held close to framing or furring. 2. Fastening in gypsum board are slightly below surface in dimple formed by driving tool. C. Finish joints, fasteners, and all openings, including openings around penetrations, on that part of the gypsum board extending above suspended ceilings to seal surface of non decorated // smoke barrier, // fire rated // and sound rated // and sound rated // gypsum board construction. After the installation of hanger rods, hanger wires, supports, equipment, conduits, piping and similar work, seal remaining openings and maintain the integrity of the // smoke barrier, // fire rated // and sound rated // construction/ Sanding is not required of non decorated surfaces. 3.6 REPAIRS A. After taping and finishing has been completed, and before decoration, repair all damaged and defective work, including nondecorated surfaces. B. Patch holes or openings 13 mm (1/2 inch) or less in diameter, or equivalent size, with a setting type finishing compound or patching plaster. C. Repair holes or openings over 13 mm (1/2 inch) diameter, or equivalent size, with 16 mm (5/8 inch) thick gypsum board secured in such a manner as to provide solid substrate equivalent to undamaged surface.
VA%2009%2029%2000.docx