for Highway Construction Page 494 of 715 SECTION 613 – CRASH CUSHIONS
613.01 Descri ption.
Provide and install crash cushion.
613.02 Materials.
Provide crash cushion with pad or foundation as shown on the crash cushion and roadside terminal categorization charts. Provide materials as specified: Nonstructural Concrete ................................................................................................................. 509 Reinforcing Steel ..................................................................................................................... 708.02
613.03 Construction Requirements.
Asse mble and install crash cushion and pad or foundation as specified and in accordance with the manufacturer’s written installati on instructions. Submit an installation and repair manual specific to the installed crash cushion. Provide and install self -adhesive object marker sheeting to the nose of the crash cushion or provide an object marker for each crash cushion.
613.04 Method of Measurement.
The Engineer will measure acceptably completed work per each installation.
613.05 Basis of Payment .
The Department will pay for acceptable quantities at contract unit prices as follows: Pay Item Pay Unit Crash Cushion, Sacrificial - Sand .......................................................... Each Crash Cushion, Sacrificial - Water Filled ............................................... Each Crash Cushion, Sacrificial - Metal .......................................................... Each Crash Cushion, Partially Reusable ........................................................ Each Crash Cushion, Low Maintenance ......................................................... Each Crash cushion pad, transitions, and object marker are incidental and the cost included in the crash cushion contract unit prices. for Highway Construction Page 495 of 71 5 SECTION 614 – SIDEWALKS, DRIVEWAYS, AND CURB RAMPS
614.01 Description.
Construct sidewalks, driveways, and curb ramps.
614.02 Materials.
Provide materials as specified in: Nonstructural Concrete ................................................................................................................. 509 Detectable Warning Surfaces .................................................................................................. 720.10 Use detectable warning surfaces consisting of truncated domes aligned in a square or radial pattern as specified. Ensure the color of detectable warning surfaces contrast visually with adjacent curb and gutter , street, or sidewalk, either light -on-dark or dark -on-light.
614.03 Construction Requirements.
Grade and compact the subgrade to 90 percent of the maximum dry density as determined by AASHTO T 99. Compact aggregate base with at least 2 passes of a lightweight mechanical tamper, roller, or vibratory system. Provide portland cement concrete as specified in 509 with the following exceptions:
1.Float -finish the concrete so the surface is slightly rough, but uniform. Work the slab edges and joints with a ¼ inch radius edging tool. Correct honey -combed or rough s pots using mortar consisting of 1 part c ement and 2 parts approved sand immediately after removing the forms .
2.Place, shape, and compact earth or other approved material against the edge of the sidewalk or driveway.
3.Construct joints as specified.
4.Cure as specified in 502.03.J.
5.Protect the concrete from damage during freezing weather as specified in 502.03.G. Ensure the detectable warning surface is securely embedded in the concrete and installed in accordance with the manufacturer’s written instructions.
614.04 Method of Measurem ent.
The Engineer will measure acceptably completed work as follows:
1.Sidewalks will be by the square yard.
2.Driveways will be by the square yard.
3.Curb ramps will be by the square yard.
614.05 Basis of Payment .
The Department will pay for accepted quantities at the contract unit prices as follows:
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 530–530 of 768.