for Highway Construction Page 556 of 715 SECTION 635 – ANTI -SKID
635.01 Description.
Provide and stockpile anti-skid material at designated locations.
635.02 Materials.
Provide materials as specified in 703.10. The Engineer will accept m aterial at the point of delivery from the Contractor -provided sources or the Engineer will accept the aggregate at the crushing plant from designated sources.
635.03 Constr uction Requirements.
Prepare the stockpile site by clearing and smoothing the area as directed. Construct stockpiles neat and regular in form and occupy as small an area as possible.
635.04 Method of Measurement.
The Engineer will measure acceptably completed work by the ton or cubi c yard.
635.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit prices as follows: Pay Item Pay Unit Anti-Skid Type____ ............................................................................... Ton or CY 636-639 for Highway Construction Page 557 of 715 SECTIONS 636 -639 - RESERVED for Highway Construction Page 558 of 71 5 SECTION 640 – CONSTRUCTION GEOTEXTILES
640.01 Description.
Provide and install geotextile.
640.02 Materials.
Provide materials as specified in 718.
640.03 Construction Requirements.
A.Shipment and Storage . Place the geotextile in a dry place off the ground and protected from damage and maintain in an opaque, heavy -duty protective covering during periods of shipment and storage.
B.Placement . Grade the area to be covered to a smooth, uniform condition without obstructions, depressions, and debris. Spread the geotextile immediately ahead of the covering operation. Do not drag the geotextile on the ground or mishandle it. Place the geotextile loosely and without wrinkles so the placement of the overlying material will not tear the geotextile. Hold the geotextile in place with pins, staples, or small piles of fill or rock. Lap or sew the geot extile, as specified, at the ends and sides of adjoining sheets. Place the cover material on the geotextile so at least 6 to 18 inches of material is between the vehicle or equipment tires or tracks and the geotextile, depending on the survivability of the geotextile and the weight of the construction equipment. Do not spread overlying material closer than 2 feet from geotextile edges before forming overlaps for installations requiring adjacent geotextile placements, so that subsequent overlaps can be constructed without having to push material back from geotextile edges. Cover the geotextile with the specified cover material as soon as possible. Do not allow the geotextile to be exposed to the elements for more than 30 calendar days for ultraviolet stabilized geotextiles and 7 days for geotextiles that have not been ultraviolet stabilized.
C.Soft Ground. Limit construction vehicle size and weight so rutting in the initial lift above the geotextile is 3 inches or less deep when geotextile is placed over soft ground. Do not turn vehicles on the first lift above the geotextile. Do not end- dump the cover material directly on the geotextile. Limit compaction of the first lift above the geotextile over soft ground to routing of placing and spreading equipment only. Do not allow sheep- foot type equipment on the first lift. Closely observe subsequent lifts during compaction, and if foundation failures occur during compaction operations, use lightweight compaction equipment. Use pegs, pins, or the manufacturer’s recommended method as needed to hold the geotextile in place until the specified cover m aterial is placed. Do not drop cover material on unprotected geotextile from a height greater than 3 feet above the geotextile surface.
D.Seams. Use sewn seams that consist of 2 parallel rows of stitching. Ensure the 2 rows of stitching are ½ inch apart with a to lerance of ¼ inch and do not cross, except for restitching. Provide a lock -type stitch. If a flat or prayer seam is used, the minimum seam allowance (i.e., the minimum distance from the geotextile edge to the stitch line nearest to that edge) is 1½ inches. Ensure the minimum seam allowance for other seam types is 1 inch.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 592–593 of 768.