Vol 2 - Garney Construction

2.03 CONSTRUCTION PANELSA. Plywood:1. General:a. Where construction panels are shown on Drawings for thefollowing concealed types of applications, provide APAPerformance-Rated Panels complying with requirementsdesignated under each application for grade designation, spanrating, exposure durability classification, edge detail, andthickness.b. Construction Panel Standards: Comply with DOC PS 1 forplywood construction panels and for products not manufacturedunder DOC PS 1 provisions, in accordance with APA PRP-108and APA Form B445.c. Trademark: Each construction panel factory-marked withAPA trademark evidencing compliance with grade requirements.B. Plywood Backing Panel: Mounting electrical, telephone, and like equipment;provide fire-retardant treated plywood panel with grade designation, APA C-DPlugged Exposure 1, in thickness shown on Drawings, or, if not shown onDrawings, not less than 15/32 inch.2.04 PRESERVATIVE WOOD TREATMENT BY PRESSURE PROCESSA. Where lumber or plywood is indicated as preservative-treated wood, inaccordance with AWPA U1 and AWPA M4, mark and grade each treated itemin accordance with SPIB 1003 or WWPA G5.1. Kiln-dry after treatment to maximum moisture content of 19 percent.2. Treat wood in contact with roofing or flashing.3. Treat wood in contact with masonry or concrete.4. Treat wood less than 18 inches above grade.B. Aboveground Materials:1. Pressure treat items with waterborne preservatives to a minimumretention of 0.25 per cubic foot.2. Interior Use: After treatment, kiln-dry lumber and plywood to maximummoisture content of 19 percent and 15 percent respectively.3. Treat the following items:a. Wood cants, nailers, curbs, equipment support bases, blocking,stripping, and similar members in connection with roofing,flashing, vapor barriers, and waterproofing.b. Wood sills, sleepers, blocking, furring, stripping, and similarconcealed members in contact with masonry or concrete.ROUGH CARPENTRYPW/WBG/38205906 10 00 - 4 AUGUST 15, 2012©COPYRIGHT 2012 CH2M HILL