Specifications include, but are not limited to: TREATED MATERIALS A. Preservative-Treated Materials: AWPA C2, except that lumber not in ground contact and not exposed to the weather may be treated according to AWPA C31 with inorganic boron (SBX). 1. Use treatment containing no arsenic or chromium. 2. Kiln-dry lumber after treatment to a maximum moisture content of 19 percent. ; LUMBER A. Dimension Lumber: 1. Maximum Moisture Content: 19 percent. 2. Interior Partition Framing: Construction, Stud, or No. 3: Eastern softwoods: NELMA; Mixed southern pine: SPIB; or Western woods: WCLIB or WWPA. ; Softwood Plywood: PS 1 Grade Clear; Graded in accordance with AWI Premium Quality; Birch species, plain or rotary cut, ½” thick.