From and after the passage of this article every person owning ground fronting or abutting upon any street in said Borough which is or shall be brought to the established grade shall grade and pave the sidewalk in front of or adjoining such ground, and construct curbs and gutters at the edge of sidewalks, in accordance with the provisions of this article, and with the established lines and grades to be furnished by the Borough Engineer, within 30 days after receiving the notice provided for in §
145-24 of this article.
When any street is or shall be brought to the
established grade and it is found that the sidewalks, curbs or gutters
already constructed do not conform to the established grade or width,
or with the requirements of this article, it shall be the duty of
the owner or owners of the ground fronting or abutting on such sidewalks
to repave or correct such sidewalks, curbs and gutters in accordance
with the proper lines and grades and with the provisions of this article,
within 30 days after the receipt of a notice to that effect or after
the service of such notice served as hereinafter provided.
All notices directing and requiring the grading,
paving, correcting or repairing of sidewalks or the construction,
correcting or repairing of curbs and gutters at the edge of the sidewalks
shall be printed or written; shall specify the width to be paved and
the location of such proposed sidewalk; and shall be served upon the
owner of ground and premises to which such notice refers, if said
owner is a resident of the said Borough. If said owner is not a resident
of the Borough of Prospect Park, then said notice shall be served
upon the agent or tenant of said owner or upon the occupant of said
ground and premises. If said owner has no agent or tenant, or there
is no occupant of said ground and premises, then service shall be
by printed or written notice tacked upon the premises.
All gutters shall be of concrete, six inches
in depth, and must conform to the same specifications as sidewalks.
All sidewalks shall be constructed of concrete
one course in depth. The concrete shall be constructed on a prepared
subgrade in one course and shall be four inches in depth except at
driveways which shall be six inches.
A. Grade. The forms shall be set to a grade having a
rise of 1/4 inch to the foot above and at right angles to the top
of the curb.
B. Forms.
(1) Outside forms shall be of wood or metal of the depth
of the concrete, straight, free from warp and of sufficient strength
when staked to resist the pressure of the concrete without springing.
If of wood, they shall be of two inches approved section, or if of
metal they shall be approved section and shall have a flat surface
on top of no less than 1 3/4 inches.
(2) The forms shall be jointed neatly and tightly and
staked securely to line and grade and shall be cleaned thoroughly
and greased or scraped before any concrete is placed against them.
C. Joint filler. The filler to be used in the transverse
joints in the pavement shall consist of an approved prepared tar or
asphalt filler having a thickness of 1/2 inch and a depth of not less
than one inch more than the depth of the pavement.
D. Excavation.
(1) Excavation shall be made in the proper dimensions
and elevations, making necessary allowance for forms and other operations
required to complete the concrete work.
(2) All soft and spongy material shall be removed and
replaced with suitable firm material, which shall be compacted to
conform in contour and firmness to the surrounding subgrade material.
E. Materials.
(1) Cement shall be normal strength, air entraining Portland
cement, ASTM designation C 150, latest revision.
(a)
Coarse aggregate.
[1]
Coarse aggregate shall consist of washed, graded
gravel or crushed stone having clean, hard, strong, durable and uncoated
particles.
[2]
Coarse aggregate shall range in size from fine
to coarse in accordance with Pennsylvania State Department of Highways
Specification No. 2.
(b)
Fine aggregate.
[1]
All sand shall be washed and screened material
and shall consist of approved inert graded particles having clean,
hard, strong, durable, uncoated grains. Deleterious materials shall
not exceed quantities specified by ASTM Standard designation C 33.
[2]
Fine aggregate for concrete work shall be properly
graded from fine to coarse in accordance with the following requirements:
|
Size of Mesh
|
Passing
(percent)
|
---|
|
3/8 inch
|
100
|
|
No. 4
|
94 to 100
|
|
No. 8
|
80 to 90
|
|
No. 10
|
77 to 88
|
|
No. 16
|
65 to 80
|
|
No. 20
|
55 to 70
|
|
No. 50
|
10 to 22
|
|
No. 100
|
0 to 07
|
F. Expansion joints.
(1) Expansion joints shall be placed approximately 24
feet apart and shall be formed during the placing of the concrete
by securely staking an iron bulkhead on lines specified for slab joints.
(2) The prepared joint filler shall be placed against
the bulkhead before the concrete is deposited against it.
G. Slab joints. The slabs or scored divided blocks shall
have an area of 16 square feet. The block divisions shall extend 1/2
inch deep in the thickness of the slab. They shall be made in a straight
line at right angles to the edges of the slab on tangent and on radial
lines where the pavement is laid on a curve.
H. Measuring.
(1) All materials shall be accurately measured by volume.
The cement shall be measured as packed by the manufacturer, a sack
containing not less than 94 pounds being considered one cubic foot.
Fine and coarse aggregate shall be measured loose.
(2) The contractor shall furnish and use an approved water
measuring and discharging device, also boxes of such dimensions as
will give, when filled and struck, the exact volume of aggregate required
for the concrete specified.
I. Mixing.
(1) All concrete shall be mixed in a batch mixer of an
approved type. The volume of the mixed material used per batch shall
not exceed the manufacturer's rated capacity of the drum in cubic
feet of mixed material. Only enough concrete shall be mixed as will
be placed within 45 minutes.
(2) The ingredients of the concrete shall be mixed to
the specified consistency. No materials shall be permitted to enter
the drums until all the preceding batch has been discharged. The time
of mixing shall be from the time all materials, including the water,
are in the mixer and before any part of the batch is discharged. The
time of mixing shall be not less than 1 1/4 minutes. No concrete
shall be mixed while the air temperature is at or below 35° F.
J. Proportioning and mixing.
(1) Water cement ratios and approximate proportions of
aggregate for medium consistency normal Portland cement concrete shall
be:
(a)
Compressive strength at 28 days:
|
Design
(lb. per sq. in.)
|
Minimum Laboratory Test
(lb. per sq. in.)
|
---|
|
2,800
|
2,750
|
(b)
Ratios:
|
Water/Cement Ratio
|
|
|
---|
|
Ratio by Volume
|
Gallons: per Bag of Cement
|
Approximate Bags Cement per. Cu. Yd. Concrete
|
|
0.93
|
7.00
|
5.1
|
(c)
Approximate proportions of cement to surface
dry aggregates by volume (sum of fine and coarse aggregate measured
separately) shall be one to six.
(2) The approximate proportions in the above table are
for concrete of medium consistency (five-inch slump), and the quantities
of cement should be changed for different consistencies, adding approximately
1/8 bag for each one inch of slump greater than five inches.
(3) All concrete covered by this specification shall develop
at 28 days, a compressive strength as above specified.
K. Retempering. Retempering of concrete which has partially
hardened, that is remixing with additional water, shall not be permitted.
L. Placing and finishing.
(1) Concrete shall be placed immediately after mixing.
It shall be tamped and struck off with a templet and shall be floated
with a wooden float until the surface has a true contour. Care shall
be taken to not bring to the surface an excess of water and fine sand
by overfinishing.
(2) All joints shall be edged to a radius of 1/8 inch.
The surface edges of each slab shall be rounded to a radius of about
1/4 inch.
M. Protection. The finished pavement shall be protected
from the hot sun, rain, high winds, frost and trespassers for at least
24 hours after the concrete is placed, and as much longer thereafter
as may be required.
N. Curbs.
(1) The specifications for curbing shall conform to the
specifications for sidewalks, except as herein provided.
(a)
All curbing shall be 18 inches in depth, six
inches in width at the top and eight inches in width at the bottom.
(b)
All curbing shall have a batter of one inch
from the top of the curbing to the surface of the gutter.
O. Forming joints.
(1) The curbing shall be constructed in uniform lengths,
or sections of 10 feet, except where shorter sections are necessary
for closures, but no section shall be less than four feet.
(2) These sections shall be separated by sheet steel templets
set perpendicular to the face and top of the curbing. These templets
shall be 1/8 inch in thickness, the width of the curbing and not less
than two inches longer than the depth of the curbing. The templets
shall be set carefully during the placing of concrete and allowed
to remain in place wherever possible until the concrete has set sufficiently
to hold its shape, but shall be removed while the forms are still
in place.
P. Expansion joints. Expansion joints shall be placed
approximately 50 feet apart. They shall be 1/2 inch in width and composed
of a suitable material that will not become soft and run in hot weather
or become brittle in cold weather.
Q. Finishing. The curbing shall be spaded sufficiently
to obtain a smooth, even finish. The edge of the face shall be rounded
to a radius of not more than 3/4 inch while the concrete is still
soft. The forms shall be removed within 24 hours after the concrete
has been placed. Minor defects shall be filled with mortar composed
of one part Portland cement and two parts fine aggregate, which shall
be applied with a wooden float. Plastering shall not be permitted.
The top and face of the curbing from the top to eight inches below
the top shall be finished while the concrete is still green by frequently
wetting a soft brick or a wood block and rubbing the surface until
it is smooth. After the concrete has been rubbed smooth, it shall
be rubbed again until a uniform color is produced, using in place
of water a thin grout composed of one part Portland cement and one
part approved sand.
R. Refilling. After the concrete has set sufficiently,
the spaces in front and back of the curbing shall be refilled to the
required elevation with suitable material which shall be tamped in
layers of not more than six inches until firm and solid. All excess
materials must be hauled away and the work left neat and clean.
[Amended 4-10-1962 by Ord. No. 795, approved 4-13-1962]
A. All concrete shall be ready-mixed concrete and shall
conform in every respect with the latest requirements for materials,
quality, mixing, delivery and tests as set forth in the Standard Specifications
for Ready-Mixed Concrete, serial designation C-94, as adopted by the
ASTM, and the general specifications herein.
(1) The following table gives the general specifications
for the quality of concrete to be used in the various classes of construction.
The contractor shall assume responsibility for the manufacturer's
design of the concrete mixture and shall furnish to the manufacturer
every item listed for the class of construction required for street
pavement.
(a)
Minimum compressive strength at 28 days, 3,500
pounds per square inch.
(b)
Size of coarse aggregate, two-inch.
(c)
Minimum cement content, 600 pounds per cubic
yard.
(d)
Air entraining, air content, 3% to 6%.
(e)
Slump on the job, maximum four inches, minimum
two inches.
(2) The basis for final acceptance of concrete shall be
the specified minimum allowable compressive strength at 28 days in
terms of tests of standard specimens cured under standard laboratory
conditions for moist curing as determined on samples taken from the
transportation unit at the point of discharge.
(3) The contractor shall provide the Engineer with a carbon
copy of each original delivery ticket accompanying loads of ready-mixed
concrete for each day's pour. The manufacturer shall certify on each
delivery ticket that the proportions selected will produce concrete
of the quality specified and that the mix has the desired air content
and slump.
(4) The contractor shall also furnish a statement to the
Engineer giving the proportions by weight (dry) of cement and of fine
and coarse aggregates used in the manufacture of each class of concrete.
(5) All rejected concrete shall be promptly removed and
replaced at the expense of the contractor.
(6) Before placing pavement reinforcement, the first layer
of concrete shall be struck off by means of an approved mechanical
templet or otherwise as directed by the Engineer. The reinforcement
shall then be placed parallel to the finish surface and shall be of
sufficient size to be continuous or lapped in accordance with approved
methods.
(7) Joints. Transverse joints, longitudinal joints, expansion
joints and construction joints shall be formed as indicated on the
drawings. One-half-inch premoulded expansion joint material shall
be placed for the full depth around all manholes, inlets and valve
boxes.
(8) Finishing. The concrete, as soon as placed, shall
be accurately struck off and screened with approved machine equipment
or hand methods, when approved by the Engineer, to the crown and cross
sections shown on the drawings.
(9) After the smoothing of the pavement has been completed,
the concrete may be finished by means of a belt of canvas, rubber
or burlap, eight inches to 12 inches wide, or a belt of wood, 12 inches
to 24 inches wide. Necessary hand finishing of joints and surface
irregularities shall be performed from approved bridges, and all edges
of the slabs and joints shall be carefully finished to a true line
with an approved edger of the required radius.
(10)
Curing. All concrete shall be kept damp for
a period of at least three days. Moisture retaining covers, such as
burlap, cotton or jute mats, are to be used. The covers shall be kept
constantly moist enough to provide a film of moisture on the concrete
surface. Curing by any other standard methods shall be subjected to
the approval of the engineer.
B. All classes of traffic and hauling shall be excluded
from the pavement by the erection of standard barricades, by the contractor,
for a period of at least 10 days.
It shall not be lawful for the owner or owners
of any property to place, allow or maintain any encroachment upon
the sidewalk fronting or abutting upon such property, such as a porch
extension, steps, railings, fences, hedges or excavations for a basement,
cellar windows or cellar doors, unless provided with protecting grating,
or to place or allow any awning, sign or branches of trees at less
than a clear height of nine feet above any sidewalk. In case of young
trees, the branches thereof under nine feet shall be permitted to
extend over the sidewalk a distance of not more than three feet from
either the building line or the curbline.
[Amended 4-4-1977 by Ord. No. 948, approved 4-4-1977]
Any person who shall violate any provisions
of this article shall, upon conviction thereof, be punishable by a
fine of not more than $300 and costs of such proceedings or, upon
default of payment of such fine and costs, by imprisonment in the
county jail for a term of not more than 30 days. The continuation
of such violation for each successive day shall constitute a separate
offense, and the person or persons allowing or permitting the continuation
of the violation may be punished as provided above for each separate
offense.