for Highway Construction Page 487 of 71 5 SECTION 609 – MINOR STRUCTURES
609.01 Description.
Construct minor structures (e.g., drops, weirs, checks, diversion boxes, culvert and siphon headwalls, and inlet and outlet structures for canals and pipes).
609.02 Materials.
Provide materials as specified in: Concrete ....................................................................................................................................... 509 Reinforcing Steel ..................................................................................................................... 708.02 Timber .......................................................................................................................................... 710 Use Class 30 concrete. The Engineer will reject bars with failing heat numbers. The Engineer will reject reinforci ng steel delivered that cannot be identified by heat number Replace rejected reinforcing steel at no cost to the Department. Provide metal grates that meet the requirements of ASTM A36. Meet the requirements of the American Weldi ng Society D1.1 when welding the grates. Use grates for the inlet headwalls only when specified. Grates do not need to be painted or galv anized.
609.03 Construction Requirements.
Excavate and backfill as specified in 210. Construct minor structures as specified in 503 and 509.
609.04 Method of Measurement.
The Engineer will measure acceptably completed work as follows:
1.Concrete by the cubic yard as specified in 509.
2.Metal reinforcement by the pound of reinforcing steel as specified in 503.
3.Timber and lumber by the thousand feet board measure (MFBM).
4.When minor structures are by each, material is incidental .
609.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit prices as follows: Pay Item Pay Unit Concrete ................................................................................................. CY Metal Reinforcement .............................................................................. lb Timber, Treated ...................................................................................... MFBM Timber, Untreated ................................................................................... MFBM Minor Structures ..................................................................................... Each for Highway Construction Page 488 of 715 Structu re excavation, compacting backfill , grates, and other related hardware cost is incidental and included in the contract unit prices for other contract pay items . for Highway Construction Page 489 of 71 5 SECTION 610 – FENCES
610.01 Description.
Provide and erect fence and gates.
610.02 Materials.
Provide materials as specified: Nonstructural Concrete ................................................................................................................. 509 Barbed Wire ............................................................................................................................. 708.09 Woven Wire ............................................................................................................................. 708.10 Hardware for Barbed or Woven Wire Fence ............................................................................ 708.11 Metal Fence Posts ................................................................................................................... 708.12 Chain Link Fence ..................................................................................................................... 708.13 Wood F ence Posts .................................................................................................................. 710.08 For temporary construction fence, provide high- visibility orange high- density polyethylene mesh , at least 4 feet tall, with metal or wood support posts.
610.03 Construction Requirements.
Remove trees, brush, and other obstacles along the fence line. Remove and dispose of material as specified in 201. See standard drawing notes for additional construction requirements for each specific fence and gate type. Set posts plumb to the spacing and depth as specified, backfill, and firmly tamp. Set posts for chain- link fence in concrete. After the posts are set, stretch and fasten the wire fencing to wooden posts with staples or to steel posts with wire cl amps. Use Class 22 concrete for post and brace bases . Crown the surface of the concrete to drain. When drilling into rock is required to set a post, the Contractor may shorten the post if at least 12 inches of post is grouted in the rock. Consider the air temperature when stretching wire. In hot weather stretch the wire just tight enough to eliminate sags, and in cold weather stretch the wire very tight. In either temperature condition, do not stretch the woven wire so tight the pre- formed kinks in the horizontal wires are straightened. Provide 4 inch by 4 inch No. 2 Common Douglas Fir or Larch horizontal and inclined wood braces. Dap posts to receive the braces and anchor the ends of the brace with three 16- penny nails or a ⅜ inch by 4 inch steel dowel. Apply a coat of pentachlorophenol solution, chromated copper arsenate (CCA), or ammoniacal copper zinc arsenate (ACZA) to daps on the posts and the ends of the braces before assembly. Provide brace wires consisting of 2 loops of 9- gauge wire twisted to form a taut cable. Lightly notch the posts to position the wire and drive 3 staples at each notch to secure the wire. When using metal braces, securely splice the tie wires to the fence on both sides of the posts so there are 2 loops behind the post and 1 loop in front, or wrap the fence wires around the post and tie off. Locate the concrete blocks for the angle braces so at least 6 inches of the angle brace are embedded in the concrete.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 523–524 of 768.