The Cairo bulletin., 1906-07-14

contractors expense Shaathing left In
perNa6ently by The order Of the said
board, ald such only. will be paid for
at 40 price bid When left in the
ieeaciia The sheathing shall be cut
of enc a. foot below the surface.
Paragraph So Where any railroad
cr street. tailroad line is to be crossed
Or int lIereI with in the construction
Of SAID seWels. specific directions as
to the imc and manner Of doing this
wors will be given the contractor by
the said board and such contractor
shaii e8aform 10 such directions.
paragIa1h 81. IN excayating and
refliihe the trenches and In con
stract.ng The scNers. care must be
taken not Ii move or injnre any gas,
watcl " sewer pipes. If necessary,
the con ract0r shall, at his own ex-
per q, cling, SHORE mp and secure such
pipe ana keep them IN repair until
The final acceptance Of the work. laav-
inc III, N III as good condition as
4 when uncovered. Whenever an exist
/ ing sewer Is intercepted the same
shall be properly connected into the
lnew concrete main sewer.
Paragraph IS. Al sucn street cross
ings and other points as may
be designated by the said Board
The sewer trenches shall be
brldged in n secure manner so as
to prevent any serious Interrupt
don to travel upon he streets and
!, sidewalks. All fire hydrants shall he
left uncovered and accessible. The
contractor shall provide for all water
courses. cutters and drains inter
rupted by The work and shall replace
them in as good conditions as
The found them All the things in this
paragraph provided for shall be
ldone at the cost and expense Of the
contractor.
| Paragraph 49, All Portland cement
used for said concrete shall be of a
fineness permitting ninety per cent
, thereof TO pass through a sieve having
ten thousand (10,000) meshes per
! lsauare inch, AS test for sonndness
. Iof the cement two patg Of neat CO
1 ment shall be made on glass. each pat
? to be about three inches In diameter
| land one-half inch in thickness al the
/ center tapering thence to thin edge
The pats shall be kept moist until
: finally set. when one shall be placed
/ in fresh water for seven days, and the
{ other in the water which shall be
no, Et v
| hours and then allowed to cool. Meth
, or pat shall show distortion or cracks
AS q test for the tensile strength Of
the cement briquettes made OF one
part of cement ana three ca parts
! of clean sand shall develop a tensile
. strength per square inch as follows:
: After seven days, one hundred and
! fifty O50) pounds; after twentyeight
+ days. two hundred (200) pounds. The
E average result from each set of bri.
| euettes at one time shall be consider
, ed the governing test Any cement
! mot moving an increase in strength
in the twcnty-eight days test over the
, seven days test shall be rejected. All
! sand used upon the work shall be
: clean. sharp sand. and shall be free
/ from loan. clay or vegetable matter
b The broken stone used upon the work
shall be OF the best quality of hard
! limestone. crushed to a size that will
! pass through a ring of three quarters
], (l) of an inch internal diameter. II
shall be free from loan, clay and
dust including crusher dust o. dirt
Paragraph 40. The entire improve
, ment hereinbefore provided for il
% this ordinance shall be constructed nm
, der the direction and to the satisfac
, ton of the Board Of Local Improve
f ments Of the said City of Cairo
,IAn the material used in the
construction Of the improvement
hereinbefore specified shall be
e of the best quality and of a kind
! specially adapted for the purpose for
: which IL shall be used. and all the
= necessary labor shall be performed in
good and workmanlike manner by
skilled workmen and with the aid OF
proper and suitable iools.
I dl d. fA IL III b+iA n bAAAAAr- ~
trenches fine earth shall be used mp "a
a point two 90 feet above the sewer
and shall be thoroughly compacted in
D layers not 10 exceed SIX 90 inches by
hand rammng The remaining portion
of the trench mp 10 the last two t2b
/, fee shall be water tamped in the fol
lowing manner. The earth shall be
llevaied off in horizontal layer two
% feet thick and flooded with water
until. after standing for five minutes.
water shall just show on the surface.
ithen another layer shall be thrown IN
land nooded in like manner This shall
b. continued MP O within two 90 feet
Of the surface and allowed 70 stand
/ for q few hours. The last two CD feet
shall then be put Ia and hand rammed
las specified above and the gravel shah
De laid on the top No water shall be
turned into the trenches until al con-
lcrete and cemen work in the sewers
have had fun time to set
Paragraph -. The work shall be
lcsrried on and fully completed In sec