for Highway Construction Page 497 of 715 SECTION 615 – CURB AND GUTTER
615.01 Description.
Construct curb, gutter, combination curb and gutter, or traffic separators.
615.02 Materials.
Provide materials as specified in: Nonstructural Concrete ................................................................................................................. 509 Superpave Hot Mix Asphalt .......................................................................................................... 405 Aggregates ................................................................................................................................... 703 Reinforcing Steel . .................................................................................................................... 708.02 Use Class 30 concrete or use ½ inch nominal maximum aggregate size (NMAS) SP 2 or SP 3 nonstructural mixture as specified in 405.
615.03 Construction Requirements.
Curb , gutter, curb and gutter, and traffic separators may be cast -in-place portland cement concrete. Curb and traffic separators may b e precast portland cement concrete. Curb may be asphalt concrete. Construct contraction joints in portland cement concrete at 10 -foot intervals to a minimum depth of 2 inches. Provide a light broom finish. Cure concrete immediately after finishing as specified in 502.03.J. When precast, cast curb in pieces at least 5 feet, but no more than 10 feet in length. Provide a smooth, glassy finish. Install precast curb on a smooth, compacted surface. Tack the roadway surface where asphalt concrete curb will be constructed. Place approved backfill material in layers behind curbs and compact.
615.04 Method of Measurement.
The Engineer will measure acceptably completed work as follows:
1.Curb and curb and gutter will be by the foot along the face of the curb.
2.Gutter and traffic separator will be by the foot along the centerline of the units. Deductions in length will not be made for embankment protectors , catch basin s, inlet s, driveways, or curb ramps installed in the curb, gutter, or curb and gutter.
615.05 Basis of Payment .
The Department will pay for acceptable quantities at the contract unit prices as follows: Pay Item Pay Unit Curb, Type ___ ...................................................................................... FT Gutter , Type ___ .................................................................................... FT Curb and Gutter , Type ___ .................................................................... FT for Highway Construction Page 498 of 715 Traffic Separator, Type ___ ................................................................... FT The Department will pay for the asphalt mix and base under the appropriate contract items. Excavation , backfill, reinforcing steel , and diluted emulsified asphalt for tack coat are incidental and the cost included in the curb and gutter contract unit prices. for Highway Construction Page 499 of 71 5 SECTION 616 – SIGNS, SIGN POSTS , AND SIGN ST RUCTURES
616.01 Description.
Provide and install signs, sign posts, sign structures, or reinstall signs or sign posts. Signs:
1.Type B Signs: Sheet Aluminum
a.Type B -1: Sheet Aluminum Sign
b.Type B -2: Sheet Aluminum Sign with LED border
c.Type B -3: Combination Sheet Aluminum and Changeable Message Sign
2.Type C Signs: Extruded Aluminum Panels
a.Type C -1: Extruded Aluminum Panel Sign
b.Type C -2: Combination Extruded Aluminum Panel Sign and Changeable Message Sign
3.Type E Signs: HDO Plywood
A.Steel Sign Posts:
1.Type A Sign Post : Wide Flange Post
a.Type A -1: W6x9 Wide Flange Post
b.Type A -2: W8x10 Wide Flange Post
c.Type A -3: W8x13 Wide Flange Post
d.Type A -4: W8x18 Wide Flange Post
e.Type A -8: W12x19 Wide Flange Post
f.Type A -9: W14x22 Wide Flange Post
2.Type B Sign Post : Steel Tube Post
a.Type B -2: 4x3 Steel Tube Post
b.Type B -3: 5x5 Steel Tube Post
c.Type B -4: 6x6 Steel Tube Post
3.Type E Sign Post : Perforated Steel Tube Post
a.Type E -1: 2x2 Perforated Steel Tube Post
b.Type E -2: 2½x2½ Perforated Steel Tube Post
B.Wood Sign Post
1.Type D Sign Post: Wood Post
a.Type D -1: 4x4 Wood Post
b.Type D -2: 4x6 Wood Post
c.Type D -3: 6x6 Wood Post
d.Type D -4: 6x8 Wood Post
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 533–534 of 768.