ITEM 608 WALKS, CURB RAMPS, AND STEPS
608.03 Concrete Walks
608.04 Asphalt Concrete Walks
608.05 Crushed Aggregate Walks
608.06 Concrete Steps
608.07 Curb Ramps
608.08 Method of Measurement
608.09 Basis of Payment
Asphalt concrete Type 1............................................... 448
Concrete, Class QC Misc or QC 1* .............................. 499
Reinforcing steel................................................. 509.02
Crushed aggregate meeting grading requirements of........ 703.10
Expansion joint material........................................... 705.03
* Replacing Coarse aggregate in the concrete mixes with Recycled Concrete Aggregate conforming to Supplement 1117 is an option
B. Forms. Use either fixed forms or slip-form methods. For fixed-form construction, use wooden or metal forms that extend the full depth of the concrete and that do not spring under the concrete pressure. For slip-form construction, perform the work according to 609.04.C.
C. Placing and Finishing. Immediately before placing concrete, thoroughly moisten the subgrade. Deposit concrete in a single layer, strike it off with a template, and smooth it with a float to obtain a sandy texture. Do not plaster the concrete. Use a 1/4-inch (6 mm) radius edging tool to edge all outside edges and joints. Divide the surface of the walks into equally spaced rectangular blocks at approximately 5-foot (1.5 m) intervals. Saw or form transverse joints to a depth of not less than one-fourth the thickness of the slab and to a width of approximately 1/8 inch (3 mm). Install 1/2-inch (13 mm) thick expansion joint filler between the walk and any fixed structure that extends the full depth of the walk. Install 1-inch (25 mm) thick expansion joint filler between the walk and the back of curb that is on a 250-foot (75 m) or smaller radius, such as at street intersections.
E. Curing. Cure concrete according to Item 451.
C. Asphalt Placement and Compaction. Place asphalt concrete in one or more courses to provide the required depth when compacted using a hand roller or power roller of a type and weight acceptable to the Engineer.
A. Excavation. Excavate according to 608.03.A.
B. Placement and Finishing. Place and finish concrete according to Item 511, except finish the treads of steps to produce a sandy texture.
D. Curing. Cure steps according to 608.03.E.
E. Railing. If specified, install hand railing according to Item 517.
608.07 Curb Ramps. Excavate, form, place, finish, and cure according to 608.03.A, 608.03.B, 608.03.C, and 608.03.E. Finish ramps to a rougher final surface texture than the adjacent walk and with striations transverse to the ramp slope using a coarse broom or other method approved by the Engineer.
The Department will measure curb ramps by the number of square feet (square meters) completed. The Department will measure detectable warnings in existing curb ramps and at grade crossings by the number of square feet (square meters) completed.
The Department will measure Concrete Steps by the number of feet (meters), along the front edge of each tread. Where steps are constructed with integral walls, the Department will include the thickness of the integral walls with the tread width measurement.
608.09 Basis of Payment. Payment for walks, curb ramps, detectable warnings, and steps is full compensation for excavation, backfill, concrete cutting/sawing, base course material, reinforcing steel, hand railing, expansion joint materials, and any incidentals required to complete the installation as specified. The Department will pay for accepted quantities at the contract prices as follows:
Item Unit Description
Asphalt Concrete Walk
608 Square Foot Curb Ramp
608 Square Foot Detectable Warning
608 Foot (Meter) Concrete Steps