The Rock Island Argus and daily union. (Rock Island, Ill.) 1920-1923, 1920-04-17

Of the necessary size shall BE- left in !!
the blocks into which the necessary |
slant shall be inserted and tightly
cemonted In.
Mortar used in segment block
joints shall be made Of Portland
cement and sand. measured in pro-
portions BY volume Of one t1) part
cement and one a. part sand. !
Mortar shall be mixed In patches
Of such quantities as to enable it
to be used quickly and no retem-
pered mortar or any that has re-
ceived an initial set shall be used.
The bottom of trench shall be
excavated up to the spring line to-
conform Is nearly - possible to
the size and shape OF the outer cir
conference OF sewer.
The outer course of the segment
block shall be started with half
length tile followed by full size
tile and laid up to sprinng line of
arch. The inner course shall be
started with full size tile and car
ried up to spring line, keeping to
grade and alignment Of sewer. In
the construction Of the arch Of the
sewer, q collapsible form Of steel
or wood conforming to exact size
Of the inner opening Of sewer shall
be used. For invert or bottom.
half q template shall be used. All
joints shall be thoroughly morton
ed. In trenches where the founda-
ton Is soft and sewer cannot be
constructed in the usual manner,
It shall be assembled in half or
whole sections Of convenient
lengths on the line Of work. then
allowed to set at least two days
before lowered into the trench.
As the work progresses, the
earth shall be we'll tamped on out
side of tile up to center or spring
line of the sewer and back filling
shall start as soon as forms are
removed.
When forms are removed, all
joints shall be neatly pointed up.
ANY material in the notion Of the
trench that is not suitable for a
firm foundation shall be removed
and suitable material substituted.
Where rock is encountered in the
bottom OF the trench, said rock
shall be removed to a depth of six
| Co inches below the outside sur
face OF the sewer and a good quail
ity of earth substituted for the rock
and thoroughly tamped.
Section VIII.
| All concrete sewers shall be
composed of one "a part cement,
one and one-half az parts sand
and three (3) parts gravel. The
walls of said concrete sewers shall
be six (6l inches thick, excepting
the concrete sewer beginning al
point "B," as hereinbefore located
which shall have walks four and
one-half ar inches thick and
shall be reinforced transversely with
hoops of one-half ~ inch in di-
ameter, round steel bars of a
length to make the ends lap one
, % foot and six 90 inches. these
hoops to be placed one Il, inch
from the inside surface four al
inches on certers and one % incl
, from the outside surface Of sale
sewers. four a. inches on centers
!, The longitudinal reinfoTcementS
! for trying transverse bars to con
, sist OF one-half ~ inch in diane
ter round reinforcing steel bar'
spaced approximately one a. foo
apart, alternately against the in
!, side and outside hoops and tied tt
.. said hopes with No. Ii wire at al
: points of intersection.
Forms shall be used in the con
= struttion of all concrete storr
e sewers herein outlined in this or
h dinance. The bottom OF the trencI
e ana the sides up to the spring lin
S OF the said concrete storm sewer
shall be eXcavated and trimmed t
} conform to the true outside surfdc
} of the said concrete storm ever
i at each respective point and inne
il form only being used in the con
5 struction Of said concrete storI
sewers from the flow line up t tn
e spring line of the same An inne
% and outer form TO be used in tn
g construction of the remaining PAL
% of said concrete storm sewers. thu
:. is from the spring line to tn to
Z of the same.
II The forms for said concrete sew
IS ers shall be built in such name
e and with sufficient strength so thu
l. after the concrete is poured in sal
S forms and rammed. it will produc
= the concrete storm sewers at tn
e places set out in this ordinance, {
o the size and dimensions hereinbe
t fore described
FL The inner face of said form
shall be of sufficient smoothnes
. to produce smooth and even SUI
e face for the inside of said concret
Isewers.
!. The forms used in constructio
" Of said concrete storm sewers sha
i be placed directly against the see
ment block storm sewers whic
4 are to be constructed at the poir
of commencement of each respec,
i've section Of concre:c storm sew
ers, so that when the concrete
- poured in said forms, it will form
4 tight joint with the adjacent SEE
9 ment block storm sewers at eac
r respective point, and the space b.
70 tween the inner and outer parts {
n the forms at the upper ends {
II each section Of concrete storm sew
It er shall be closed with good sui
J. stantial material that will prever
g the fresh concrete from springin
Of out at the end of the forms whe
h rammed.
r The work in the construction
Is each section of concrete stor
IS sewers shall progress with sun
IS Gent rapidity and the SUGGEST,
+ patches deposited in continue,