3.1 INSTALLATION, GENERAL 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 nailers, blocking, and similar supports to comply with requirements for attaching other construction. B. Do not use materials with defects that impair quality of rough carpentry or pieces that are too small to use with minimum number of joints or optimum joint arrangement. C. Use common wire nails, 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; predrill as required. D. Countersink nail heads. 3.2 WOOD FRAMING INSTALLATION, GENERAL A. Framing Standard: Comply with AF&PA's "Manual for Wood Frame Construction," unless otherwise indicated. B. Do not splice structural members between supports, unless specifically detailed. C. Provide a minimum of three inches of bearing for dimensional lumber. D. Where built-up beams or girders of 2-inch nominal dimension lumber on edge are required, fasten together with 2 rows of 20d nails spaced not less than 12 inches o.c], staggered on opposite faces. Locate one row near top edge and another near bottom edge. Provide two (2) 20d nails at each end and at each splice.
