The Cairo bulletin. (Cairo, Ill.) 1???-1928, 1909-07-28

W fl-iVOt leel DSlUW the Top SuTldce
Of the street grade for said West
Twenty-first street, as herenbefore
1 established for the top surface of the
completed brick pavement upon the
said West Twenty-hrst street at the
point of the termination of the said
sewer.
The sewer herein provided for is
constructed for street surface drain
age
Section 49, The sewer trenches
shall be carefully and evenly excavated
and with such slants or ordinations in
the sides thereof as viii leave no risk
OF caving or falling in and where
such risk cannot otherwise be avoided
proper snoring must he resorted to.
To enable the workmen TO do the woI k
to the best advantage, both as to the
matter of securing proper founda-
ton and for laying the pipe the bot
toms Of the trenches shall be made at
least one "a foot wider than the ex.
Iternal diameter of the sewer pipe AMI
wider if 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 be laid thereon, so that
the hubs or bells as we'll as the body
of the pipe may be carefully embed,
tded and have an even bearing on the
bpttYtN ~ tho
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 VIII
make safe and permanent founda-
! ton for the work.
Section 10. The sewer pipe, and
inlet pipe shall be OF the best grade
and quality of vitrified tile sewer
| pipe, salt glazed, and free from cracks,
flaws, bliSers, lumpS or other defects
or hlemishes, and shalt 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 G-12l Of the in
ternal diameter of the pipe and the
Joint connections of the pipe Shall b.
fitted tight and close and laid in the
best quality OF Portland cement NOR
tar, composed OF one CD part Of &C..
mcnt and one On part of clean sand
with only enough water to give CON
.sistencY 10 the mortar, which shall be
used as soon as made, and before low
ering the joints or pieces of pipe into
the trenches, they shall be carefully
examined and inspected and those not
meeting the foregoing requirements
shall be rejected and removed from
he work, The pipes shall be so laid
In the trenches that after the sewer
Is completed the interior surface
thereof shall conform accurately to
the grade herein given for the laying
OF the sewer and all adjustments To
line and grade Of pipe, ;ald directly
upon the bottom of the trench, must
be done by scraping away or filling in
with earth and compactiug the same
under the body of the pipe and net by
blocking or wedging mp. Before lay
ing, the interior Of the bell shall be
carefully wiped smooth ana clean ana
the annular space shall be free from
dirt or mortar. A narrow gaskct Of
packing shall be properly calked into
each joint after which Portland ce-
ment mortar, composed of one "a |
par of cement ana one % part OF |
clean sand, shall be introduced there |
m and such gaskct snail be OF one |
piece Of sufficient length to reach en- |
tirely around the pipe and of suf-
ent thickness to bring the bottoms Of |
the TWO pipes 20 the same level No |
Joint shall be cemented until the gas
ket of the next two joints in advance
are properly inserted Special care |
must be taken to fill with mortar thu
space at the bottoms aud
sides as well as at the tops of IN"
Joints. After such space has been
illed, the cement having been compact
ad with a wooden or IRON calking tool
4 neat finish shall be given to the joint
by the further application OF similar
mortar to the face Of the hubs. so as
o form con inuous and even bevelcd !
surface from the exterior of the hub
o the exterior of the spgot all /,
around. As soon as Tie cement OF
my joint has been compacted the bell
lole under the hub Must be carefully
md compactly filled with sand or fin
arth so as 10 hold the exterior NOR
ar finish of eaid joints securely in IFS
llace The refilling saall then be car
led half way up the sides of the en-
ire length Of pipe with selected earth
nd compacied with proper tamping
DOL. While tho pip 5 being laid in
.ach section between manholes or
'thcr permanent openings. light from
ne r"mc'c end OF the section shall re-
main constantly in view.
Section %. The sewer trench l.
hall be carefully filled. rammed and 4
amped in Uniform layers of suitable {