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.
viii.Surface texture.
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.
iii. Compaction.
iv. Measure length and width and pay in square feet.
2. Steps.
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).