The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1909-07-26


intersection of Seventeenth street
and Walnut street, in the Seven
teenth street sewer at an elevation of
nine and ninety-one hundredths ODD
feet below the top surface OF theI
stone monument at the southwest
corner of Commercial avenue and
Sixth street, in the said City of Cairo,
and from thence the said sewer shall
be laid in a northerly direction. on a
straight line and shall rise at the
rate of two-tenths t210) of fcotI
per centum to a manhole to be con
structed in the said Walnut street, at
point twenty-four t24D feet Gorth of
the south line of Twentieth street,
where the said sewer shall terminate.
and where the elevation of the said
sewer shall be seven and ninety-eight
one.hundredths (7.9S) feet below the
| top surface OF said stone monument
hereinbefore specified.
Section 20. The sewer trenches
shall be carefully and evenly excavat-
| ed and with such slants or inclina-
| lions in the sides thereof as will leave
no risk of caving or falling in, and
where such risk cannot otherwise be
avoided, proper snoring must be re-
| sorted to. To enable the workmen to
do the work to the best advantage,
both as to the matter OF securing
proper foundation and for laying the
pipe, the bottoms OF the trenches
shall he made at least one "a foot
wider than the external diameter of
the sewer pipe and wider II found
necessary or best and they shall be
curved or shaped to the form and size
of the lower half Of the sewer pipe TO
he laid thereon, so that the hubs or
bells as well as the body of The pipe
may be carefully embedded AMI have
an even bearing on the bottom of the
| trenches.
Whenever the ground, at the bot
tom of the sewer trench, .shall not be
| found TO be sufficiently firm or solid
for the laying of the sewer pipe. the
same shall be put IN proper and suit
able condition by the contractor by
the use OF such materials as will
make safe and permanent founla-
| ton for the work.
| Section 81. The sewer pipe. housa
connection pipe and inlet pipe shall
he OF the best grade and quality of
vitrihed tile sewer pipe, salt glazed,
and free from cracks, flaws. blisters,
| Jumps or other defects or blemishes.
and shall be OF the hub and spigot
pattern. Both the body and the bell
shall be of double strength and have
a thickness OF not less than one
twelfth u.12) of the internal diane
ter Of the pipe and the joint connec-
lions of the pipe shall be fitted tight
and close and laid In the best quality
OF Portland cement mortar, com
posed OF one ~ part OF cement and
one ~ part OF clean sand with chi"
enough water to give consistency to
the mortar, which shall be used as
soon as made, and before lowering
the joints or pieces Of pipe into
the trenches, they shall be care
fully examined and inspected and
those not meeting the foregoing
requirements shall be rejected and re-
moved from the work. The pipes
shall be so laid In the trenches that
after the sewer is completed. the into.
rior surface thereof shall conform ac.
curately TO the grade herein given for
the laying of the sewer. and all ad.
! justments to line and grade of pipe.
laid directly upon the bottom of the
| trench, mist be done by scraping
away or filling in with earth and com.
patcing the same under the the body
of the pipe and not by blocking OF
wedgiug up. Before laying, the inte
rior of the bell shall be carefully
wiped smooth and clean and
The aunular space shall be free
from dirt or mortar. A mar
row gasket of packing shall be proper
| ly calked into each joint after which
Portland cement mortar composed OF
one ~ part OF cement and one On
| part of clean sand. shall be introduce
therein, and such gasket shall be Of
one piece Of sufficient length to reach
entirely around the pipe and Of suffi
cient thickness to bring the bottoms
OF the two pipes to the same level
No joint shall be cementcd until the
gaskets of the next two joints in al
vance are properly inserted. Special
care must be taken TO fill with mortar
The annular space at the bottoms and
sides as well as at the tops of the
joints. After such space has been
allied, the cement having been com
pacted with a wooden or iron calking
tool, neat finish shall be given TO the
Joint by the further application Of
similar mortar to the face of the hubs.
so as TO. form a continuous and even
beveled surface from the exterior Of
| the hub 10 the exterior of the spigoi
all around. AS soon as the cement of
| any joint has been compacted, the
bell hole under the hub must be care
fully and compactly filled with sand
or fine earth so as 10 hold the extc
rior morfar finish of said limits s.,