Orange County NC Website
Browse       Search
DocuSign Envelope ID: B94F2D40-3B3C-47A7-86C2-6F1 B4F92C62C <br /> SECTION 09 21 16-GYPSUM BOARD ASSEMBLIES <br /> C. Provide fire rated panels where required by hourly ratings on drawings or identified in the field as an existing rated <br /> wall. <br /> 2.3 TRIM ACCESSORIES <br /> A. Interior Trim:ASTM C 1047. <br /> 1. Material: Paper-faced galvanized steel sheet. <br /> 2. Shapes: <br /> a. Cornerbead: Use at outside corners. <br /> b. LC-Bead (J-Bead): Use at exposed panel edges. <br /> c. L-Bead: Use where indicated. <br /> d. Expansion(Control)Joint:Use where indicated and where recommended by manufacturer of gypsum panels. <br /> B. Trim: Extruded accessories of profiles and dimensions indicated. <br /> 1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may <br /> be incorporated into the Work include, but are not limited to, the following: <br /> a. Fry Reglet Corp. <br /> b. Gordon, Inc. <br /> c. MM Systems Corporation. <br /> d. Pittcon Industries. <br /> 2. Aluminum: Alloy and temper with not less than the strength and durability properties of ASTM B 221, <br /> alloy 6063-T5. <br /> 3. Finish: Corrosion-resistant primer compatible with joint compound and finish materials specified. <br /> 4. Drywall Control Joint Trim: H-shaped plastic edge trim to define edge of two abutting gypsum panels at <br /> control joints. H-trim to have zip strip front face, caulk reveal per Division 07, "Joint Protection". <br /> 2.4 JOINT TREATMENT MATERIALS <br /> A. General: Comply with ASTM C 475. <br /> B. Joint Tape: <br /> 1. Interior Gypsum Wallboard: Paper. <br /> C. Joint Compound for Interior Gypsum Wallboard: For each coat use formulation that is compatible with other <br /> compounds applied on previous or for successive coats. <br /> 1. Prefilling: At open joints, rounded or beveled panel edges, and damaged surface areas, use setting-type <br /> taping compound. <br /> 2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and trim flanges, use <br /> setting-type taping compound. <br /> a. Use setting-type compound for installing paper-faced metal trim accessories. <br /> 3. Fill Coat: For second coat, use setting-type, sandable topping compound. <br /> 4. Finish Coat: For third coat, use setting-type, sandable topping compound. <br /> 2.5 ACOUSTICAL SEALANT <br /> A. Acoustical Sealant for Exposed and Concealed Joints: Nonsag, paintable, nonstaining, latex sealant complying with <br /> ASTM C 834 that effectively reduces airborne sound transmission through perimeter joints and openings in building <br /> construction as demonstrated by testing representative assemblies according to ASTM E 90. <br /> 2.6 AUXILIARY MATERIALS <br /> A. General: Provide auxiliary materials that comply with referenced installation standards and manufacturer's written <br /> recommendations. <br /> B. Laminating Adhesive:Adhesive or joint compound recommended for directly adhering gypsum panels to continuous <br /> substrate. <br /> C. Steel Drill Screws:ASTM C 1002, unless otherwise indicated. <br /> 1. Use screws complying with ASTM C 954 for fastening panels to steel members from 0.033 to 0.112 inch thick. <br /> 2. For fastening cementitious backer units, use screws of type and size recommended by panel manufacturer. <br /> ©BOOMERANG DESIGN#1835 0921 16-2 510 Meadowlands Drive,Hillsborough, NC <br /> ORANGE COUNTY,NC 11/15/18 <br />