for Highway Construction Page 491 of 715 SECTION 611 – CATTLE GUARDS
611.01 Description.
Construct cattle guards.
611.02 Materials.
Use Class 30 concrete . Provide material as specified in: Metal Reinforcement .................................................................................................................... 503 Structural Metal s ........................................................................................................................... 504 Nonstructural Concrete ................................................................................................................. 509 Culverts ........................................................................................................................................ 602 Fences ......................................................................................................................................... 610
611.03 Construction Requirements.
Complete roadway grading at the location of the cattle guard before excavating for the cattle guard. Backfill the structure with granular material as specified in 210.
611.04 Method of Measurement.
The Engineer will measure acceptably completed work by the each, including the wing braces and posts. The distance between the posts will be excluded from measurement for fence.
611.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit prices as follows: Pay Item Pay Unit Cattle Guard, Type ___ .......................................................................... Each Structural excavation and compacting backfill are incidental and the cost included in the cattle guard contract unit price. The Departme nt will pay for culverts as specified in 602. for Highway Construction Page 492 of 71 5 SECTION 6 12 – GUARDRAIL
612.01 Description.
Provide and install guardrail and concrete barrier .
612.02 Materials.
Provide materials as specified in: Excavation and Embankment ....................................................................................................... 205 Concrete ....................................................................................................................................... 502 Metal Reinforcement .................................................................................................................... 503 Steel Guardrail Posts ............................................................................................................... 708.07 Guardrail and Hardware .......................................................................................................... 708.14 Wood Guardrail Posts and Wood Blockouts ............................................................................ 710.03
612.03 Construction Requirements.
A.Guardrail . Install galvanized steel w -beam or thrie- beam guardrail as specified . Set posts plumb. Backfill around posts with native soil or pea gravel. Place backfill material in layers and thoroughly tamp. The Contractor may drive the posts if it can be done without damage to posts, pavemen t, shoulders, or adjacent slopes. Drill timber posts before treating. Field drilling is allowed provided the hole is treated with a wood preservative as specified in 710.09 before installing the bolts . Remove, replace, or reinstall misaligned, loose, or damaged posts and repair damage to the existing pavement , shoulders, or adjacent slopes at no additional cost to the Department. Install guardrail terminals in accordance with the manufacturer’s written installation instructions. Provide and install self -adhesive object marker sheeting t o the end of guardrail terminals or provide an object marker for each guardrail terminal.
B.Concrete Barrier. Concrete according to 502. Finish the concrete on precast and cast -in-place concrete barrier with an ordinary surface finish as specified in 502.03. Set concrete barrier to the line and grade as specified.
612.04 Metho d of Measurement.
The Engineer will measure acceptably completed work as follows:
1.W- beam guardrail , precast concrete barrier , and cast -in-place concrete barrier will be by the foot, including the length of anchors, terminals, and transitions.
2.Guardrail anchors, guardrail terminals, guardrail transitions, concrete barrier terminals, and concrete barrier transitions will be per each.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 527–527 of 768.