A. Set rough carpentry to required levels and lines, with members plumb, true to line, cut, and fitted. Fit rough carpentry to other construction; scribe and cope as needed for accurate fit. Locate furring, nailers, blocking, grounds, and similar supports to comply with requirements for attaching other construction. B. Framing Standard: Comply with AF&PA's "Details for Conventional Wood Frame Construction," unless otherwise indicated. C. Provide blocking and framing as indicated and as required to support facing materials, fixtures, specialty items, and trim. D. Sort and select lumber so that natural characteristics will not interfere with installation or with fastening other materials to lumber. Do not use materials with defects that interfere with function of member or pieces that are too small to use with minimum number of joints or optimum joint arrangement. E. Comply with AWPA M4 for applying field treatment to cut surfaces of preservative-treated lumber. 1. Use inorganic boron for items that are continuously protected from liquid water. 2. Use copper naphthenate for items not continuously protected from liquid water. F. Securely attach rough carpentry work to substrate by anchoring and fastening as required. G. Use common wire nails or screws, unless otherwise indicated. Select fasteners of size that will not fully penetrate members where opposite side will be exposed to view or will receive finish materials. Make tight connections between members. Install fasteners without splitting wood; do not countersink nail heads, unless otherwise indicated. 3.2 WOOD GROUND BLOCKING, AND NAILER INSTALLATION A. Install where indicated and where required for screeding or attaching other work. Form to shapes indicated and cut as required for true line and level of attached work. Coordinate locations with other work involved. B. Attach items to substrates to support applied loading. Recess bolts and nuts flush with surfaces, unless otherwise indicated. C. Where wood-preservative-treated lumber is installed adjacent to metal decking, install continuous flexible flashing separator between wood and metal decking. D. Provide permanent grounds of dressed, pressure-preservative-treated, key-beveled lumber not less than 1-1/2-inches wide and of thickness required to bring face of ground to exact thickness of finish material. Remove temporary grounds when no longer required. 3.3 WOOD FURRING INSTALLATION A. Install level and plumb with closure strips at edges and openings. Shim with wood as required for tolerance of finish work. B. Furring: Install 1- by 3-inch nominal-size furring horizontally and vertically at 24 inches on center. 3.4 PROTECTION A. Protect rough carpentry from weather. If, despite protection, rough carpentry becomes wet, apply EPA-registered borate treatment. Apply borate solution by spraying to comply with EPA-registered label.
