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

ard specifications of the American
Society of Testing Materials.
adopted August Is, 1909, with
amendments and additions thereto,
sdopted by said society.
All send referred to in this ssti-
mate is taken as clean, sharp river
sand containing not more than i've
$50 per cent clay, the grains be-
ing of such size that will pass
through a No. IL sieve and not
more than forty (40To) per cent
will pass through No. so sieve.
All gravel mentioned in this es-
innate shall be screened and wash
ed, free from all foreign matter
uniformly graded and shall range
in size from one-fourth ca inch
up to that which will pass through
a one and one-half (1h) inch ring.
All sewer pipe herein mentioned
shall be deep socket, thoroughly
vitrified, salt glazed stoneware
sewer pipe, known as Monmouth
No. Sewer Pipe" or other sewer
pipe of as good grade and quality
and said pipe shall be made in
lengths of not less than two and
one-half (2k) feet and shall be
uniformly burned free from bis
tiers, cracks or other imperfections
and shall be uniformly cylindrical
in form and with the bell ends also
truly cylindrical in form and with
sufficient annular openings to per-
NIT of properly cementing the
space between the bell and spigot
ends of the successive pipe.
All joints of said sewer pipe shall
be filled with a mortar made with
one % part Portland cement and
one % part sand mixed to a thick
paste and made as nearly imper-
vious to water as possible.
Said sewer pipe shall have a
she'll one and one-fourth az
inches thick and a socket three 6,
inches deep.
All segment block shall be of the
best quality of vitrified clay ware
thoroughly burned and salt glazed
and true to form known as
"Streator Segment Block" or other
Segment Block of as good grade
and quality, and shall be free from
checks or fire cracks. They shall:
be made in two (2) rings SO that
the blocks of one % ring will in
terlock with those of the adjoining
ring and the longitudinal joints of
the one ring will break joints with
those of the other ring. The wear
ing surface of longitudinal joints
in the inner ring shall not be less
than two and one-half GU times
the thickness OF the wearing sur
face OF said ring. All surfaces
which will come in contact with
the mortar in joints, shall be scar
flied or grooVed in order to Sc
cure satisfactory bond.
All joints on the inside of the
sewer shall be pointed and rubbed
as soon as the section of the in
vert is completed and the loose
mortar removed.
The minimum thickness of the
walls of the segment block sewers
shall be as follows:
, For 5 foot internal diameter 4ir
, inches.
For foot internal diameter. s
inches.
For ) foot internal diameter 81.
inches.
For 51s foot internal diameter
fs,2 inches
For AZ foot internal diameter 6
inches.
For foot internal diameter u:
inches.
functions for connections on Wit
rified tile segment block sewer
shall be made with a "Y" branch.
Where the size of the branch is
such as to permit, it shall be burn
ed on the block as an integral part
thereof. Where the size is such
that this cannot be done, openings
of the necessary size shall be left
in the blocks into which the nee
essary slant shall be inserted and
tightly cemented in.
All concrete manholes mentioned
in this estimate are to be con-
structed as follows:
The manholes shall be circular
section of two (2) feet internal
diameter from the bottom up to the
top of the same. The walls of saiG
manholes shall be six 60 inches
thick, made of concrete consisting
Of one o. part Portland cement,
one and one-half az parts sand
and three 81 parts gravel. Said
concrete manholes shall be of the
highest herein given and the center
of the manholes shall be directly
over the center line of the sewer at
which point the manholes are to
be constructed. The tee branch
with two (2) foot circular open
ing shall be placed in the segment
block sewer at each point where
manholes are to be constructed, the
tee branch being on the top sur
face Of the sewer and the center of
tuC lCC VI dAAu UCiutS III IuC ACulCi
of the manhole at said point. Said
manholes shall be built directly
upon the top surface of the sewers
at which point they are to be con-
structed and the bottom of the
walls of said manholes shall come
in contact with the surface of the
sewer at all points.
All of said concrete manholes
herein outlined are to be covered
with a cast iron cover. made of
strong gray cast iron of close
grained structure weighing not less
than four hundred fifty (450)
pounds per cubic foot.
The cast iron shall be tough and
even grain and shall possess a ter
sile strength of not less than eight
cen thousand (1S,000) pounds per
square inch. All cast iron covers
shall be clean and perfect without
blow or sand holes or defections of
any kind and said metal shall be