SECTION 06114

WOOD BLOCKING AND CURBING

PART 1 GENERAL

SECTION INCLUDES

Roof curbs [and cants].

Blocking in [wall] [and] [roof] openings.

Wood furring and grounds.

Concealed wood blocking for support of [toilet and bath accessories] [wall cabinets] [wood trim] [and] [________].

Telephone and electrical panel boards.

[Preservative treatment of wood.]

RELATED SECTIONS

Section [______-____________]: Concrete openings to receive wood blocking.

Section [______-____________]: Masonry openings to receive wood blocking.

[Section 06112 - Framing and Sheathing.]

Section [______-____________]: [Wood] [Metal] roof decking to receive wood curbs [and cants].

Section [______-____________]: [Window] [Door] [________] openings to receive wood blocking.

REFERENCES

ALSC - American Lumber Standards Committee: Softwood Lumber Standards.

APA: American Plywood Association.

AWPA (American Wood Preservers Association) C1 - All Timber Products Preservative Treatment by Pressure Process.

AWPA (American Wood Preservers Association) C20 - Structural Lumber Fire Retardant Treatment by Pressure Process.

NFPA: National Forest Products Association.

RIS: Redwood Inspection Service.

SPIB: Southern Pine Inspection Bureau.

WCLIB:	West Coast Lumber Inspection Bureau.

WWPA: Western Wood Products Association.

SUBMITTALS

Submit under provisions of Section [01300.] [________.]

Product Data: Provide technical data on wood preservative materials and application instructions.

QUALITY ASSURANCE

Perform Work in accordance with the following agencies:

Lumber Grading Agency:	Certified by ALSC.

Plywood Grading Agency: Certified by [APA.] [____.]

PART 2 PRODUCTS

MATERIALS

Lumber Grading Rules: [NFPA] [RIS] [SPIB] [WCLIB] [WWPA] [________].

Miscellaneous Framing: [Stress Group [D] [____],] [[________] species,] [19] [____] percent maximum moisture content [, pressure preservative treat].

Plywood: APA [Rated Sheathing] [Structural I], Grade [C- D] [____]; Exposure Durability [1] [2]; [sanded.] [unsanded.]

****** [OR] ******

Particleboard: [ANSI A208.1] [APA [Waferboard] [Oriented Strand Board] [Structural Particleboard]; wood [chips] [shavings] [flakes] set with waterproof resin binder; [________] grade; [sanded] [unsanded] faces.

ACCESSORIES

Fasteners and Anchors:

Fasteners: [Hot-dipped galvanized] [Zinc electroplated] steel for high humidity and treated wood locations, unfinished steel elsewhere.

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.]

FACTORY WOOD TREATMENT

Fire retardant: [AWPA Treatment C20, [Exterior] [Interior] Type,] chemically treated and pressure impregnated; capable of providing a maximum flame spread/smoke development rating of [____] / [____]; [________] manufactured by [____________].

Wood Preservative (Pressure Treatment): [AWPA Treatment C1] using [water borne] [_____________] preservative with [0.25] [_____] percent retainage.

Wood Preservative (Surface Application):	[Clear] [colored], [_____________] type, manufactured by [_____________].

PART 3 EXECUTION

FRAMING

Set members level and plumb, in correct position.

Place horizontal members flat, crown side up.

Construct curb members of single pieces.

Space framing [and furring] [16] [24] [____] inches ([400] [600] [____] mm) o.c.

Curb roof openings [except where prefabricated curbs are provided]. Form corners by alternating lapping side members.

[Coordinate curb installation with installation of [decking and support of deck openings,] [roofing vapor retardant,] [parapet construction,] [and] [________].

SHEATHING

Secure sheathing to framing members with ends over firm bearing and staggered.

Install telephone and electrical panel boards with [plywood] [________] sheathing material where required. Over size the panel by [12] [____] inches ([300] [____] mm) on all sides.

SITE APPLIED WOOD TREATMENT

Apply preservative treatment in accordance with	manufacturer's instructions.

Brush apply [one] [two] coats of preservative treatment on wood in contact with [cementitious materials] [roofing and related metal flashings] [and] [_________]. [Treat site-sawn cuts.]

Allow preservative to dry prior to erecting members.

SCHEDULES

Roof Blocking: S/P/F species, 19 percent maximum moisture content, pressure preservative treatment.

Telephone and Electrical Panel Boards: 3/4 inch thick, square edges, site brush applied preservative treated.

END OF SECTION