Curbs shall be constructed as follows:
All curbs shall have the following dimensions:
A.
A minimum bottom thickness of eight inches.
B.
A minimum top thickness of seven inches at the top.
C.
A minimum depth of 18 inches.
D.
A height above the gutter line of six inches; provided, however,
a minimum of four inches and maximum of eight inches may be allowed
under certain gutter conditions upon the prior, written and/or oral
approval from an authorized Borough official.
[Amended 5-15-2013 by Ord. No. 2013-1836]
A.
The curb area shall be excavated to the required depth. The material
upon which the curb will be constructed shall be compacted to a firm,
uniform and even surface.
B.
In situations deemed due to existing grade or ground conditions,
and in accordance with industry standards, the Borough official may
require an additional eight inches of subsoil excavated, which shall
be backfilled and tamped with crushed stone before construction of
the curb.
A.
Forms shall not discolor the concrete. All curbs shall be constructed
and reconstructed using the steel curb and radius forms specified
in the version of PennDOT Pub. 408.
B.
Forms shall not be removed for at least 12 hours in the period from
April 15 to October 15 or for at least 24 hours during the rest of
the year. In no event shall the forms be permitted to remain in place
for more than 48 hours.
All penetrations through the curb shall be formed, sleeved or
core-drilled. Cutting of curb is prohibited. The maximum penetration
allowed is four-inch-diameter SDR 35 PVC.
A.
Division plates shall be placed at ten-foot intervals; provided,
however, in the event division plates cannot be used, saw contraction
joints shall be cut four inches deep at the top and front of the curb
at ten-foot intervals. Saw contraction joints shall be cut as soon
as possible after the concrete has set sufficiently to preclude raveling
during the sawing and before any shrinkage cracking occurs in the
concrete.
[Amended 5-15-2013 by Ord. No. 2013-1836]
B.
The depth of the saw cut may be decreased at the edge adjacent to
the pavement to obtain a maximum depth without pavement damage.
C.
The edges of construction joints shall be rounded to a one-fourth-inch
radius.
D.
One-half-inch pre-molded expansion joint material shall be cut to
the cross section area of the curb and shall be installed at all structures
and thirty-foot intervals.
[Amended 5-15-2013 by Ord. No. 2013-1836]
Concrete shall be poured in the forms in layers not exceeding
five inches in depth; provided, however, that when using a vibrator
to eliminate voids, concrete may be poured in layers up to 15 inches
in depth.
Upon removal of forms, any irregular surfaces shall be corrected,
preferably by rubbing the irregular surface with a carborundum stone.
The face of curb shall have a smooth, rubbed surface to the gutter
line. Brush-finishing or plastering will not be permitted. Minor defects
may be filled with mortar. No voids or honeycomb shall be permitted
on the finished surfaces of the curb. The top surface of the curb
shall be smooth and evenly finished, preferably using a wood float.
While the concrete is still plastic, the edges of the face and back
of the curb shall be round.
As soon as possible after the removal of the forms, but in no
event more than 12 hours after the removal of the form, any void behind
the curb shall be backfilled. The excavated area shall be filled with
three-fourths-inch modified stone to six inches below the level of
finish grade. Six inches of topsoil shall be placed on top of the
stone, and the area shall be raked and seeded. New seed must be watered
within 24 hours after initial placement.
Upon written approval by the Borough official, curb may be placed
with a self-propelled machine, provided that the concrete placed with
the self-propelled machine maintains its shape without slumping after
extrusion and that the curb is finished in accordance with the provisions
set forth herein.
Curb ramps shall be constructed at all intersections, including
private and public alleys, in accordance with the applicable ADA standards.
Slope requirements set forth in the applicable ADA standards shall
be strictly adhered to, and a correction order shall be issued for
any slope not meeting the minimum or maximum requirements as allowed
by applicable ADA standards. A variance from slope requirements may
be obtained upon written request to the Borough official only where
there is a nonrelocatable structure which makes strict compliance
with the applicable slope requirements impracticable.
A radius curb shall be constructed at all intersections, including
intersections between public or private alleys and a street. The minimum
radius for any curb at a street intersection shall be 10 feet. The
minimum radius for any curb at an intersection between two alleys,
where applicable, or an alley and a street shall be five feet. Radius
curbs and walks shall be poured monolithically from the point of curvature
to point of tangent.
