Any person within the confines of the City who
shall, voluntarily or pursuant to a notice given under Section 32
of the City Charter, construct or lay a curb or curbing along or in
front of any property within the City shall be required to conform
to the rules and regulations of this article.
A.
All curbs or curbing shall be constructed of concrete
cast poured in well-supported forms at one pouring at a time when
the outside temperature shall not be below 40° F.
B.
Concrete shall be placed or poured immediately after
mixing and shall be tamped and struck off with a template and shall
be troweled until the surface has a fine contour both as to grade,
proper care to be taken to bring to the surface any excess of water
and fine sand.
All curbs and curbing shall conform to the line
and grade as the same are established by the City Manager.
All curbs and curbing laid within the City shall
have a minimum width of six inches at the top and 7 1/2 inches
at the bottom.
All curbs or curbing laid within the City shall
have a minimum depth of 20 inches.
The concrete used shall be composed of one part
cement to two parts of fine aggregate to four parts of coarse aggregate
by volume.
The cement used shall be portland cement and
shall meet the requirements of the standard specifications of the
American Society for Testing and Materials (Serial Designation C9-32).
The fine aggregate used shall consist of clean,
natural or beach sand or screenings from hard, tough, crushed rock
and be well graded. All fine aggregate used shall pass through a one-fourth-inch
screen, and 95% shall be retained on a one-hundred-mesh screen.
The coarse aggregate used shall consist of hard,
durable, clean and uncoated pebbles, broken stone or blast furnace
slag or thoroughly washed gravel. All coarse aggregate shall pass
through a one-inch screen, and 95% shall be retained in a one-fourth-inch
screen.
The water used shall be clean enough to drink
and shall not exceed 6 1/4 gallons per ninety-six-pound bag of
cement.
The subgrade of any curb or curbing shall consist
of a layer of gravel or cinders, shall be well drained, and shall
be compacted to a minimum layer of six inches of a firm surface with
a uniform bearing power.
The drains or weep holes of any curb or curbing
shall consist of wrought or galvanized pipe, of a minimum diameter
of 3/4 inch, with a minimum space of ten-foot centers, and shall be
provided through curbing supporting or retaining waterlogged soil.
When any curb or curbing is poured, it shall
be retained or conformed in forms made of smooth forced lumber, bearing
a minimum thickness of two-inch lumber board or of steel of equal
strength. On all curbs flexible strips of lumber or metal shall be
used and shall be rigidly held in line and grade by stakes and braces.
The concrete used in the pouring of any curb
or curbing shall be mixed until each particle of fine aggregate is
coated with cement and until each particle of coarse aggregate is
coated with mortar.
The curb shall be cut into separate sections
not greater than 10 feet in length, with the outer surface edge rounded
to a minimum radius of 1/2 inch. The slabs shall be separated by division
plates of steel of a minimum thickness of 1/8 inch and shall be commensurate
with both the width and depth of the curb or curbing.
The expansion joints of any curb or curbing
shall have a maximum spacing of 50 feet on any one course where the
curb intersects a sidewalk or another curb, shall extend from the
surface to the subgrade, shall be at right angles to the curb surface
and shall be completely filled with compressible material consisting
of premolded strips of bitumin-filled fibre or mineral aggregate at
least 1/2 inch thick, five inches wide and two inches long. At all
intersections with a sidewalk or other curb, expansion joints shall
have a minimum thickness of one inch.
Forms shall not be removed until the concrete
has set for a period of 72 hours.
The finished concrete shall be properly cured
by being kept wet for a minimum of seven days.
The City Manager shall, upon request, inspect
any curb or curbing laid within the City. Should such curb or curbing
comply and conform to this article, he shall certify that fact in
writing to the person requesting his certificate to that effect.
B.
The Secretary of the Commissioners shall immediately
forward to the owner of the property abutting on which any curb or
curbing shall have been laid in violation of this article a notice
to repair such curb or curbing so that the curb or curbing shall conform
to this article. Upon the failure of any abutting owner to comply
with said notice in the space of 60 days, the procedure set forth
in Section 32 of the Charter of the City shall be pursued.
