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DocuSign Envelope ID: B49FB256 -4ADF- 4759- AF63- 134AD44FC239 <br />5thWall Building Diagnostics Consultants Slate Roof Replacement <br />Orange County Skills Development Center <br />Chapel Hill, NC <br />August 2017 <br />retention of alkaline copper quaternary (ACQ -C) and shall conform to AWPA Standard C -2 <br />for ground contact. Asphaltic or creosote preservatives shall not be used. The presence of <br />AWPA quality mark LP -22 on each piece is required. Where full penetration of ACQ is not <br />evident, field cuts shall be coated in accordance with AWPA standard M-4. Dimensions <br />shall be determined by job conditions. Site -sawn ends shall be treated with one coat of <br />preservative treatment. <br />B. Plywood: Shall be structural 1 rated, pressure - treated in accordance with AWPA C9 with <br />.40 pcf retention of alkaline copper quaternary (ACQ -C) as required for ground contact. <br />Plywood shall be stamped APA RATED SHEATHING grade C -C or better, and shall be <br />manufactured with exterior glue (exposure 1). Plywood shall be dried after treatment to a <br />moisture content of 18 percent or less. Plywood shall be 5/8 inch in thickness, or as <br />otherwise noted. <br />2.02 Accessories <br />A. Nails shall be ring shank 16- penny, cement coated (untreated wood); use ring shank stainless <br />steel nails for treated wood locations. <br />B. Fasteners (Screws) shall be stainless steel and meet ASTM A153; connectors shall meet <br />ASTM A653 Class G 185. <br />C. Bolts shall be stainless steel meeting ASTM Al 53. <br />D. Masonry anchors shall be 1/4 inch expanding anchor -type having stainless steel nail or <br />approved equal; length shall be as required to provide a minimum of 1 -1/2 inch embedment <br />in masonry. Plastic or nylon anchors shall not be allowed. <br />E. Concrete anchors shall be a one - piece, pre- expanded 1/4 inch diameter, flat head anchor, <br />corrosion protected with zinc with yellow dichromate and shall be made of high grade <br />tempered steel having a shear strength greater than grade 8 steel and have a tensile <br />strength of not less than 2050 psi. <br />PART EXECUTION <br />3.01 Inspection <br />A. Verify that existing construction is sound and dry so as to adequately support new <br />components. <br />B. Verify that damaged or deteriorated portions of existing wood nailers and blocking have <br />been removed. Damaged or deteriorated materials shall be removed in full, continuous <br />lengths. <br />C. Verify that surfaces of masonry walls are sound, firmly anchored, and smooth. Provide new <br />masonry units as required. <br />D. Document the actual quantities of materials installed in progress reports to Designer. <br />17 -198 Rough Carpentry <br />061000 -3 <br />