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<br />061140.2 – ROUGH CARPENTRY <br /> <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 />PART 2 PRODUCTS <br /> <br />2.01 MATERIALS <br /> <br />A. Wood Blocking (Treated): Shall be No. 2 or better southern yellow pine, kiln-dried prior to and to a <br />moisture content of not more than 19 percent. Shall be sound, thoroughly seasoned, dressed to nominal <br />finish dimension, and free of warpage, cupping, and bowing. All nailers and other blocking associated <br />with the roofing installation shall be pressure treated with 0.40 pcf retention of alkaline copper <br />quaternary (ACQ) and shall conform to AWPA Standard U1, to the requirements of use category for <br />ground contact. Asphaltic or creosote preservatives shall not be used. The presence of AWPA mark <br />confirming preservative type and retention (use category) on each piece is required. Where full <br />penetration of ACQ is not evident, field cuts shall be coated in accordance with AWPA standard U1. <br />Dimensions shall be determined by job conditions. Site-sawn ends shall be treated with one coat of <br />preservative treatment. <br /> <br />B. Wood Roof Deck: Shall match existing size, type and length. <br /> <br />C. Plywood: Shall be stamped APA-rated CDX (C side out), smooth-faced, exterior grade (Exposure 1 <br />minimum). For plywood installed to repair/replacement existing materials, match the existing <br />plywood thickness (field verify) exactly to maintain a flush surface with surrounding materials. For <br />new plywood, provide a minimum 3/4″ thickness. <br /> <br />D. Wood Deck Repair: Shall be a minimum of 2 layers of 22 gauge galvanized sheet. <br /> <br />2.02 ACCESSORIES <br /> <br />A. Fasteners specified shall be the minimum required product. If a condition exists that does not match a <br />fastener condition or type listed below, the Contractor may submit a separate type and profile of <br />fastener for review. All fasteners to be used to secure treated wood products must be a stainless steel. <br /> <br />B. Wood to masonry/concrete: Minimum 1/4″ diameter stainless steel masonry/concrete anchors. <br />Where additional wood blocking, roof membrane, or sheetmetal flashing will cover the secured <br />wood component, anchor heads must be either countersunk or otherwise finish flush with the <br />surface of the wood. Minimum embedment into the substrate shall be 2″, unless otherwise required <br />by the manufacturer to meet required pull-out resistance. Pre-drill for fasteners as <br />required/recommended by the manufacturer, or necessary to prevent spalling of the substrate <br />material. Plastic or nylon anchors shall not be allowed. Fastener spacing shall not exceed 12″ on <br />center unless otherwise noted on the drawings. <br /> <br />C. Wood to steel angles: Minimum self-tapping, 410 stainless steel 1/4″ no. 14 screws and a minimum <br />of 2.5″ long. Use a flat head screw. <br /> <br />D. Wood to metal (general): Minimum self-tapping, stainless steel no. 12 screws. Where additional <br />wood blocking, roof membrane, or sheetmetal flashing will cover the wood component, anchor <br />heads must be either countersunk or otherwise finish flush with the surface of the wood. Minimum <br />fastener penetration shall be 1″, unless otherwise required by the manufacturer to meet required <br />pull-out resistance. <br />DocuSign Envelope ID: 89558C18-938A-4BFF-B14A-A2214E8AA5DD