General Construction Specifications
SECTION 06114
WOOD BLOCKING AND CURBING
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Roof curbs and cants.
B. Blocking in wall and roof openings.
C. Wood Nailers and Blocking.
D. Wood furring and grounds.
E. Preservative treatment of wood.
1.02 RELATED SECTIONS
A. Section 07512 - Built-Up Coal Tar Roofing.
1.03 REFERENCES
A. ALSC - American Lumber Standards Committee: Softwood Lumber Standards.
B. APA: American Plywood Association.
C. AWPA (American Wood Preservers Association) C1 - All Timber Products Preservative Treatment by Pressure Process.
D. NFPA: National Forest Products Association.
E. SPIB: Southern Pine Inspection Bureau.
1.04 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Provide technical data on wood preservative materials and application instructions.
1.05 QUALITY ASSURANCE
A. Perform Work in accordance with the following agencies:
1. Lumber Grading Agency: Certified by ALSC.
2. Plywood Grading Agency: Certified by APA.
PART 2 - PRODUCTS
2.01 MATERIALS
A. Lumber Grading Rules: NFPA SPIB.
B. Miscellaneous Framing: Stress Group A 19 percent maximum moisture content, pressure preservative treat.
C. Plywood: APA Rated Sheathing Structural I Exterior Exposure Durability 1 unsanded.
2.02 ACCESSORIES
A. Fasteners and Anchors:
1. Fasteners: Hot-dipped galvanized steel for high humidity and treated wood locations, unfinished steel elsewhere.
2. Anchors: Toggle bolt type for anchorage to hollow masonry. Expansion shield and lag bolt type for anchorage to solid masonry or concrete. Bolt or ballistic fastener for anchorages to steel.
2.03 FACTORY WOOD TREATMENT
A. Wood Preservative (Pressure Treatment): AWPA Treatment C1 using water borne preservative with 0.25 percent retainage.
PART 3 - EXECUTION
3.01 FRAMING
A. Set members level and plumb, in correct position.
B. Place horizontal members flat, crown side up.
C. Construct curb members of single pieces.
D. Space framing and furring 16 inches o.c.
E. Curb roof openings except where prefabricated curbs are provided. Form corners by alternating lapping side members.
F. Coordinate curb installation with installation of decking and support of deck openings, roofing vapor retardant, and any obstructions.
G. Anchor to concrete or masonry at 24-inches on center maximum.
END OF SECTION
