Amador ledger., 1907-08-09
An Ordinance Declaring
and Determining the
General Specifications
for the Construction of
Pipe Sewers. ManhoIes,
Lampholes. Catchbasins
and Flush Tanks in the
City of Jackson.

ltlOns for the construction of pipe
sewers, manholes, lamp holes, catch
basins and flush tanks shall be and
are hereby. determined to be as
follows:
Excavation.
Sub. l. The width of trench from
top to bottom shall be eight inches
wider on each side than the exterior
diameter of the pipe. No tunneling
to be allowed except by special per-
mission of the proper official.
Sub. 2. The sides of the trench
shall be parallel to, and at an equal
distance from each side of the center
line of the sewer as surveyed by the
city engineer or his deputy.
| Sub. 3. The bottom of the trench
shall be graded to the exact grade,
which shall be obtained by measuring
with rod from fine string drawn
tightly, parallel with the grade, to
the bottom grade for the outside of
pipe; said string to be stretched
between grade planks, which shall be
at least two inches thick; said planks
to be laid level and at right angles
across trench from grade stakes set
by the city engineer.
| Sub. 4. Crosscuts deep enough to
receive the sookets of pipes shall be
cut in the bottom of trench so the
pipe will not rest on the sockets or
collars.
Sub. 5. The sides of trench shall be
supported with suitable planking
and bracing whenever necessary.
Sub. 6. Where the trench is In rock
the excavation must be six inches
| below grade; and the bottom brought
to grade with earth we'll rammed.
Sub. Z. Whenever the bottom of the
trench comes in mud or quicksand,
the bottom must be made solid by re-
placing the mud or quicksand with
earth or sand, or by plank or timber,
sufficient to insure firm foundation
Sub 8. Where there is macadam
Oh line of excavation the rock shall
be kept in separate piles from the
must be handled with a olose-tined
fork, separating the rock from the
coarse rock. The coarse rock shall
be replaced first and the fine rock
placed on top. The rock must be
thoroughly rammed by tamping with
iron bars OF suitable size, weight and
pattern, or rolled with a roller of at
least tour tons weight.
Pipe.
Sub. 9. The pipes shall he desig-
mated by their interior dIameters.
They shall be of the best quality OF
vitrified iron-stone, with sockets thor
oughly burned and free from cracks
or other defects.
Sub. 10. The pipe shall be thor
oughly glazed on exterior and interior
surfaces.
Sub. II. The pipe shall not vary
from true cylinder more than one
| twelfth 1-12) of an inch for each
three (3) inches of diameter of pipe.
Sub. II. The thickness of pipe shall
be no less than the following;
For six inches diameter 81 of an
inch.
For eight inches diameter "a Of an
inch.
For ten inches diameter q of an
inch.
For twelve inches diameter "a of an
inch.
For fourteen inches diameter one
| inch.
For sixteen inches diameter In
inches.
For eighteen inches diameter IL
| inches.
For twenty inches diameter IL
inches.
For twenty-five inches diameter
Ia inches.
For twenty four inches diameter
~ inches.
Sub. ID. ALI pipe before being laid
must be examined by the SuperIn-
tendent of Streets, or Superintendent
of Construction. The pipe must be
of proper dimensions, must be
straight, must be free from cracks,
must be thoroughly glazed as required
by Sub. 10. All Jumps and scales
must be scraped off from the inner
surface with tIowel or other instru-
ment by the contractor before the
pipe is brought near the trench.
Laying Pipe.
Sub. IA. The pipe must be sounded
for cracks which will not be allowed
in the work. ALI pipes must be fitted
together and matched before being
lowered into the trench, so as to
secure the truest line possible on the
bottom of the interior of the pipes.
They must be marked when in this
position and laid In the trench as
marked.
Sub. Is. Each pipe must lie on the
grade of trench and the spigot end be
bedded in the cement mortar in the
socket of the pipe previously laid !;
said cement mortar to extend around
the inside of said socket on the lower
half of the circle. Care must be
taken that the lower inside surfaces
of the pipes are flush or even.
Sub. 16. The outsides of sockets
must be bedded also in mortar laid
in the crosscuts previously cut in the
trench.
Sub. II. The pipe must be pressed
along into the sucket so that the
spigot end will be at most one fourth
inch from the shoulder of the socket.
After the pipe is properly on grade
and line the socket of the proceed ing
pipe must be filled all around with
cement mortar and pressed in with
hand filling mortar flush with outside
of socket and one inch on body of
entering pipe.
Sub. Is. As soon as the pipe is laid
and cemented, fine earth, gravel and
sand must be pressed under the sides
of the pipe and half way up the sides
of the pipe before the next pipe is
laid.
Sub. 10. After the pipe Is laid In
place the joint inside must be scraped
with a circular disk or swab to re-
move any surplus cement and to
smooth the JOINT inside, or a sack
filled with straw to fit the pipe close
ly and with a rope attached to pull
the sack through each joint as it is
laid, may be used.
Sub. 20. Any pipe which has been
disturbed after the cement has set
must be taken up, the FONTS cleaned