HomeMy WebLinkAbout02168care shall be taken in cutting a neat hole into the sewer main, and
in the event of breakage of the sewer main, the broken section shall
be removed and replaced at no cost to the City.
Section 6.18: The bottom of the trench must be smooth and free
of large rocks which may injure the side sewer pipe, Where unsuit-
able bedding is found, as determined by the superintendent, tke side
sewer contractor or other persons doing the work, shall overexcavate
and prepare a bedding as follows:
(a) Soft Foundation: Overexcavation as directed by the
superintendent and instill 1" to 2" washed rock or 1 1/2"
maximum size concrete aggregate, properly graded, to a
point 3" below the pipe. Prom this point to the pipe,
install properly graded concrete sand bedding.
(b) Hard Foundation: Overexcavate a minimum of 3" and
install a bedding of properly graded concrete sand.
Section 6.19: Any unauthorized overexcavation below the pipe
grade shall be filled with bedding material as outlined in
Section 6.18 b.
Section 6.20: The side sewer contractor or other persons doing
the work shall carefully revmove the plug from the tee or stub out
and shall prevent entrance of.all foreign material into the pipe.
The type of joint to be used for connecting the side sewer pipe
to the tee or stub out shall be that for which the wye was designed.
Rubber or plastic joint adapters shall be used as required to
connect pipes and wyes of different materials or joint designs.
Selected bedding material as outlined in Section 6.18 shall be hand -
tamped in a moist condition under and around the wye and connec-
tion to the wye made so as to prevent any pressure on the wye.
Care shall be taken to prevent the dislodging of this hand -tamped
material during the balance of the backfull and water settling oper-
ation. All sewers shall be laid true to grade with the bells up-
grade. Pipe shall be firmly bedded for the full length of the barrel
in the prepared trench bottom. Pipe shall be carefully centered
prior to the joining. Joints shall be installed in strict com-
pliance with the manufacturer's recommendations. Spigots ends
shall be thoroughly cleaned before applying gasket cement and
-12-