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<br />077200.3 – ROOF ACCESSORIES <br /> <br />Project Manual for Whitted Building Roof Replacement <br />Orange County, Hillsborough, NC <br />Prepared by Atlas Engineering, Inc., 551-A Pylon Drive – Raleigh, NC 27606 <br />May 2022 <br /> <br />B. Ladder Fastener: Where adhesive anchors shall be used to secure ladder brackets into grouted <br />masonry walls, anchoring adhesive shall be a two-part 100% solids epoxy-based resin and hardener <br />supplied in manufacturer’s standard cartridge and dispensed through a static mixing nozzle <br />supplied by the manufacturer. Epoxy shall meet the requirements of ASTM C-881 Type IV, Grade <br />3, Class B and C. Acceptable manufacturers include Sika Corporation, Hilti Inc., and Simpson <br />Strong-Tie Co. Basis of design is Hilti HY-200A for concrete substrate and HY-70 for masonry <br />substrate. The Contractor will be responsible for selecting a compatible system based on the <br />existing substrate and submitting product, preparation, and installation data to the Designer for <br />approval. Submittal of the ICC-ES report for systems will be required. <br /> <br />C. Ceiling Access Hatch: Shall be 30"x36" flush mounted access 2-hour fire rated panel. Panel shall <br />have an upward swing with key opening. Similar to the ceiling access hatch sold by Best Materials <br />(https://www.bestmaterials.com/detail.aspx?ID=23227). <br /> <br />D. Galvanizing Repair Paint: High zinc dust content paint for re-galvanizing welds in galvanized steel, <br />with dry film containing not less than 94 percent zinc dust by weight, and complying with DOD- <br />P-21035 or SSPC-Paint-20. <br /> <br />2.03 CEILING FRAMING <br /> <br />A. Ceiling Tile Grid: Shall be 15/16” x 1-3/8” galvanized steel. Color to match existing. <br /> <br />B. Ceiling Tile: Shall match existing. <br /> <br />C. Metal Stud: Shall be 3-5/8” x 1.25” 25 gauge galvanized steel metal stud. <br /> <br />D. Drywall: Shall be 5/8” Type X fire resistant gypsum panel. <br /> <br />E. Drywall Joint Compound: Shall be premixed all-purpose drywall joint compound. Use <br />compatible joint tape. <br /> <br />PART 3 EXECUTION <br /> <br />3.01 ROOF HATCH <br /> <br />A. Coordinate new roof hatch location on Roof Area A on site with the Engineer/Designer and <br />with installation of a new interior access ladder. <br /> <br />B. Cut a new roof hatch opening on Roof Area A. <br /> <br />C. Modify the roof hatch opening on Roof Area B to accommodate the new roof hatch size. <br /> <br />D. Frame the roof hatch opening with wood framing/blocking per the design drawings and <br />section 061140. <br /> <br />E. Install the new roof hatch in strict accordance with the manufacturer installation instructions. <br /> <br />DocuSign Envelope ID: 89558C18-938A-4BFF-B14A-A2214E8AA5DD