This work consists of constructing walks, curb ramps, and steps.
Subgrade should be prepared and compacted to the elevations and locations as shown on the plans. Forms should be checked for any bulges and for proper cross slope. Ensure subgrade is wetted prior to placement of concrete for walk. Do not allow concrete finishers to apply water to the surface of pavement to aid in finishing of concrete. Any additional water added to the surface of the fresh concrete increases the water/cement ratio of mortar and adversely affects air content. This results in a less durable matrix and the concrete surface is more prone to early scaling and general surface deterioration. Prior to acceptance the walk should be checked again for cross-slope, surface defects, cracking outside of joints.
The same practices outlined above for Concrete Walks should apply to curb ramps. Additional attention should be given to this operation to ensure that the ramps conform to the slopes, elevations and dimensions given in the plans and applicable standard drawings. It is critical to ensure that minimum dimensions are adhered to and that slope tolerances are not exceeded to ensure compliance with ADA standards.
Concrete Walk, Asphalt Concrete Walk, Aggregate Walk, Curb Ramp, and Detectable Warning are to be paid by the number of square feet of finished surface complete in place. Concrete Steps are to be paid by the lineal foot. Measure the completed in place length of each tread width, along the front edge, and add together for the total length.
a. Concrete walks.
i. Depth and width of base material (if required).
ii. Wet subgrade (if necessary) and compact.
iii. Slip formed or fixed form construction.
iv. Were forms oiled?
v. Depth of concrete.
vi. Concrete used.
vii. Spacing on joints – 5 foot (1.5 m) intervals.
ix. Curing (required and used).
x. Expansion material was placed at full-depth at ______________(location).
xi. Slope = ________(inches/ft [cm/m] cross-slope).
xii. Measure length and width and pay in square feet.
b. Asphalt concrete walks.
i. Depth and width of base material.
ii. Compaction of base material.
iii. Form check, depth, and width.
iv. Asphalt used and compaction.
v. Slope = ________(inches/ft [cm/m] cross-slope).
vi. Measure length and width and pay in square feet.
c. Crushed aggregate walks.
i. Form check, depth, and width.
ii. Crushed aggregate used.
iv. Measure length and width and pay in square feet.
a. Form dimensions (riser and tread).
b. Reinforcing steel (if required), number, and size of bars/clearances.
c. Were forms oiled?
d. Concrete used.
e. Curing (required and used).
f. Surface finish.
g. Measure length of each tread and then add together for pay.
3. Curb ramps.
a. Form dimensions.
b. Concrete used.
c. Curing (required and used).
d. Surface finish.
e. Measure and pay by the square foot (square meter).