All work and materials shall be in accordance with Pennsylvania
Department of Transportation Publication 408, except as herein provided
or as approved by the Borough Engineer.
Concrete shall conform to Type A concrete for cement concrete
sidewalks. Type A concrete shall have a minimum compressive strength
of 3,300 psi after 28 days.
The subbase shall be six inches of compacted aggregate. The
aggregate shall be stone, gravel or slag meeting the requirements
for Type C or better No. 2A material.
The aggregate subbase shall be spread on the prepared foundation
to form a compacted bed six inches in depth, unless otherwise directed
by the Borough Engineer. This material shall be thoroughly compacted.
Satisfactory outlets for draining the bed shall be provided.
Forms shall be of wood or metal, straight, free from warp and
of sufficient strength when staked to resist the pressure of the concrete
without springing. If wood, they shall be nominal two-inch planks
surfaced on the inside and top; or if metal, they shall be of approved
section. Forms shall have a depth equal to the depth of the concrete
and shall be thoroughly cleaned and oiled before concrete is placed
against them. Forms that are worn, bent or damaged shall not be used.
The concrete shall be placed in the forms in horizontal layers.
The concrete shall be four inches in depth unless otherwise indicated
on the drawings or specified. The concrete shall be struck off and
have a wood float or brush finish. Unless otherwise directed, an edger
having a one-fourth-inch radius shall be used for edging all joints.
Side forms shall not be removed within 12 hours after the concrete
has been placed. After removal of the forms, minor honeycombed areas
shall be filled with mortar composed of one part of cement and two
parts of fine aggregate. Major honeycombed areas will be considered
as defective work and shall be removed and replaced at no expense
to the Borough.
After the concrete has cured for a period of not less than 72
hours, the spaces adjacent to the sidewalk shall be backfilled with
approved material in layers of not more than four inches in depth,
which shall be thoroughly compacted mechanically to the required elevation
and cross section.
Handicapped/pedestrian ramps shall be installed in locations
directed by the Borough.
Engineering specifications for cement concrete sidewalks are
illustrated on a detail sheet prepared by the Borough Engineer, which
is hereby declared to be a part of this article, and the notations,
references and other data shown thereon are as much a part of this
article as if the same were fully set forth herein.