Specifications.pdf

AG-0261-S-14-0008 WOODEN TRAIL BRIDGE ATTACHMENTS Page 1 of 16

DESCRIPTION/SPECIFICATION/STATEMENT OF WORK

Scope of Contract

This project consists of the fabrication and furnishing of materials for 2 timber trail bridges and delivery to the Idaho City Ranger District Compound in Idaho City, Idaho.

The Contractor shall furnish all timber materials and hardware, transport to the delivery location, and shall perform all work required to complete the fabrication as shown on the plans, including providing a set of shop drawings for approval prior to the start of fabrication. Provide an inspection certification for the lumber for the species and grade, and provide a production certification for the treated wood per FP-03 Section 716.

Delivery Schedule: on or before May 15, 2014.

Package the timber materials and hardware for each bridge in separate bundles marked with the bridge number shown on the plans.

Contact Everardo Santillan at the Idaho City Ranger District at 208-392-3735 at least 2 days prior to delivery.

Project Location

The project site is located on the Idaho City Ranger District, Boise National Forest, Boise County, Idaho.

From Boise, take Highway 21 for 39 miles to Idaho City, turn left on Montgomery Street and follow to the Idaho City High School, turn left on Centerville Road, follow for about 100 yards, and turn left into the Forest Service Compound (delivery location).

AG-0261-S-14-0008 WOODEN TRAIL BRIDGE ATTACHMENTS Page 2 of 16

Section 716. — MATERIAL FOR TIMBER STRUCTURES

716.01 Untreated Structural Timber and Lumber. Conform to AASHTO M 168. Furnish an inspection certification from an agency accredited by the American Lumber Standards Committee for the species and grade. Mark all pieces with the inspection service, grade designation, species, and inspector identity.

Season and dry all structural timber and lumber before fabrication. Do not use material that is twisted, curved, or otherwise distorted.

Do not use boxed-heart pieces of Douglas fir or redwood in outside stringers, floor beams, caps, posts, sills, or rail posts. Boxed-heart pieces are defined as timber so sawed that, at any point in the length of a sawed piece, the pith lies entirely inside the four faces.

716.03 Treated Structural Timber and Lumber. Furnish wood according to Subsection 716.01. Incise all wood and make all dimensional cuts and holes in the wood before pressure treatment. Treat the wood and mark each piece of treated timber according to AASHTO M 133. Treat glued laminated timber members according to AWPA Standards C14 and C28. Use the type of treatment and minimum net retention of preservative shown in the plans.

Treat timber members according to Best Management Practices for the Use of Treated Wood in Aquatic Environments as published by the Western Wood Preservers Association.

All treated timber members must have a quality mark approved by the American Lumber Standards Committee for individual pieces or sealed pallets assuring that treatment conforms to the appropriate AWPA standards.

Provide a production certification for each lot of treated wood according to Subsection 106.03. Indicate the preservative used, penetration in inches, retention in pounds per cubic foot (assay method), and the “Best Management Practices” used in treating timber members.

716.04 Structural Glued Laminated Timber. Furnish structural glued laminated timber according to AITC

117. Fabricate according to the combination and grade as indicated in the contract. Fabricate structural glued laminated members according to ANSI/AITC A190.1, Structural Glued Laminated Timber.

Manufacture members as industrial appearance grade for wet use conditions, using a phenol-resorcinol resin type of adhesive throughout. Use only single- or multiple-piece laminations with bonded edge joints.