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

herdnbefore d ',ed in this or,
dinance.
II wooden forms are used the
tagging shall consist of good sub |
stantial lumber free from knot
holes not less than one ID inch
thick, nor less than six (6J inches
wide with one smooth face to in
sure a smooth and even surface for
said walls.
The uprights shall be Of good
substantial lumber, free from
knots, commonly known as axis
and spaced sufficiently close to-
gether and wired across from each
other to prevent the forms from
spreading after the concrete Is
poured and rammed. Where wal
ing is used, it shall be of the same
material as that used for the up
rights.
II steel forms are used they shall
be of the type "Blaw" steel form or
any other steel form Of any other
make equal thereto.
All forms shall be sprinkled be-
fore the concrete is poured and
shall not be removed until the con-
crete receives its initial set.
Said wingwalls and header walls
shall not be constructed at any OF
the respective points until the NOR
tar in the segment block sewers or
the concrete in the concrete sewers
at each respective point has reach
ed such q degree Of hardness that
said sewers will not be injured by
the construction of said wingwalls
and header walls.
The wingwalls shall be built
straight up on the inside facing
the center line of the sewer, the
batter being on the outside Of the
side of the walls away from the
center line Of the sewer. The work
in the construction Of each separ-
ate pair of wingwalls and header
wall shall progress with sufficient
rapidity and the successive patches
deposited in continuous proportion
until said wingwalls and header
wall are completed to form one
monolithic mass.
The concrete shall be mixed in
the proportion of one "a part
Portland cement, one and one-half
az parts sand and three 90
parts gravel. The material shall
be mixed wet enough to produce a
concrete of consistency that will
, flush readily under light tamping,
but which can be handled without
causing separation of the course
, aggregate from the mortar and no
concrete shall be used that is par
TALLY hardened.
Section X.
,, All storm sewers herein men
/ toned shall have circular open
! ing.
: The lines of the storm sewers as
A herein located, are taken as the
2 center lines of the respective sew
e ers.
4 All trenches provided for in this
, ordinance shall be backfilled anc
4 the earth thoroughly tamped from
d the bottom of said trench to tbs
J. spring line of the sewer Al
S trenches after being backhllet
: shall be neatly rounded over.
: All street pavement which shall
5 be necessary to remove in con
u structing said hereinbefOre de
: scribed storm sewer, shall be re
U stored to its present condition a:
II nearly as possible.
All concrete referred to in thi
l. ordinance is taken as one IL par
n Portland cement, and one and one
r half tx, parts sand an. three g
h parts gravel.
lie All cement referred to in thi
IS estimate is taken as Portland Gem
o ent which shall comply with III
,e Standard Specifications of TIL
IS American Society of Testing Ma
sr teriais. adopted August Is. 100!
l. with amendments and addition
M thereto, adopted by said society.
lie All sand referred to in this est
er mate is taken as clean. sharp rive
lie sand containing not more than fiv
TT to'c) per cent clay, the grains be
at ing of such size that i'll pas
'p through No II sieve and no
more than forty (40Fo) per cen
v will pass through a No. so sieve.
er All gravel mentioned in this es
at innate shall be screened and wash
id ed, free from all foreign matte
,e uniformly graded and shall rang
le in size from one-fourth "a inc
Of up to that which will pass throug
e. a one and one-half Q1a) inch rini
All sewer pipe herein mentione
.. shall be deep socket, thorough
&c vitrified, salt glazed stonewar
- sewer pipe, known, as "Monmout
r. No. l Sewer Pipe" or other sewe
" pipe of as good grade and qualit
and said pipe shall be made i
N lengths of not less than two an
III one-half (21sl feet and shall b
8 uniformly burned free from bills
m tiers, cracks or other imperfection
ut and shall be uniformly cylindrics
t. in form and with the bell ends ais
v truly cylindrical in form and wit
is sufficient annular openings to pei
a NIT of properly cementing the spac
& between the bell and spigot ends {
n the successive pipe. All hubs G
G. sockets must be Of sufficient dian
Of eter to receive for their full dept
Of the spigot end Of the next follow
" ing pipe or special without an
b. chipping whatever of either an
Mt also to leave space Of not les
,g than one-eighth % inch in widt
en- all around for the cement morts
joint.
=, All joints of said sewer pip
-, shall be filled with a mortar mad
= with one ~ part Portland cemel
:. and one o. part sand mixed to
W thick paste and made as nearly in