Orange County NC Website
Browse       Search
Orange County Health Department Improvements Smith Sinnett / 2024008 <br />Hillsborough, NC Orange County Asset Management Services <br />ACOUSTICAL TILE CEILINGS 09 51 23 - 4 <br />2. Size: Select wire diameter so its stress at 3 times hanger design load (ASTM C 635, Table 1, "Direct Hung" <br />) will be less than yield stress of wire, but provide not less than 12 gauge diameter wire. <br />D. Hanger Rods: Mild steel, zinc coated or protected with rust-inhibitive paint. <br />E. Angle Hangers: Angles with legs not less than 7/8 inch wide; formed with 0.04-inch- thick, galvanized steel sheet <br />complying with ASTM A 653/A 653M, G90 coating designation; with bolted connections and 5/16-inch- diameter <br />bolts. <br />F. Seismic Struts: Manufacturer’s standard compression struts designed to accommodate lateral forces. <br />G. Seismic Clips: Manufacturer’s standard seismic clips designed and spaced to secure acoustical tiles in-place. <br />2.4 METAL SUSPENSION SYSTEM FOR ACOUSTICAL TILE CEILING <br />A. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work <br />include, but are not limited to, the following: <br />B. Products: Subject to compliance with requirements, provide one of the following: <br />1. Armstrong World Industries, Inc. <br />2. USG Interiors, Inc. <br />3. Chicago Metallic <br />4. CertainTeed <br />C. Intermediate Duty, Direct-Hung, Double-Web, Suspension System: Main and cross runners roll formed from and <br />capped with cold-rolled steel sheet, prepainted, electrolytically zinc coated, or hot-dip galvanized according to <br />ASTM A 653/A 653M, G30 coating designation. <br />1. Structural Classification: Intermediate-duty system. <br />2. Access: Upward and end or side pivoted, with initial access openings of size indicated below and located <br />throughout ceiling within each module formed by main and cross runners, with additional access available <br />by progressively removing remaining acoustical tiles. <br />D. Indirect-Hung, Fire-Rated Suspension System: Main and cross runners roll formed from cold-rolled steel sheet with <br />15/16 wide exposed faces on structural members, prepainted, electrolytically zinc coated, or hot-dip galvanized <br />according to ASTM A 653/A 653M, G30 coating designation. <br />1. Structural Classification: Intermediate-duty system. <br />2. Carrying Channels: Cold-rolled steel, 0.059850-inch- minimum base (uncoated) metal thickness, not less <br />than 3/16-inch- wide flanges by 1-1/2-inch- deep steel channels, 475 lb/1000 feet, with rust-inhibitive paint <br />finish. <br />3. Access: Where access is indicated, provide special cross runners or split splines to allow for removal of <br />acoustical units in indicated access areas. Identify access tile with manufacturer’s standard unobtrusive <br />markers for each access unit. <br />2.5 METAL EDGE MOLDINGS AND TRIM <br />A. Products: Subject to compliance with requirements, provide one of the following: <br />1. Armstrong World Industries, Inc. <br />2. Chicago Metallic Corporation <br />3. USG Interiors, Inc. <br />B. Roll-Formed, Sheet-Metal Edge Moldings and Trim: Type and profile indicated or, if not indicated, manufacturer’s <br />standard moldings for edges and penetrations that comply with seismic design requirements; formed from sheet <br />metal of same material, finish, and color as that used for exposed flanges of suspension system runners. <br />1. Provide manufacturer’s standard edge moldings that fit acoustical tile edge details and suspension systems <br />indicated and that match width and configuration of exposed runners, unless otherwise indicated. <br />2. For circular penetrations of ceiling, provide edge moldings fabricated to diameter required to fit penetration <br />exactly. <br />Docusign Envelope ID: 2D852F9B-A7CF-462A-9536-444A53AA848A