The Caucasian. (Shreveport, La.) 1900-192?, 1903-06-07

The bricks are to be thoroughly sat
urated with clean water Immediately be-
tore laying. Every brick shall be neatly
and truly laid bv line, in full Joint of
mortar, at one operation and in no case
shall mortar be slushed or grouted in
after the brick is laid. All bricks must
break joint with those in the adjoining
courses.
All joints below the spring line of the
arch shall be neatly struck. and the
FONTS of the arch shall be cleaned off to
the tace of the brick work after the
centrs have been removed. The Joints
between the courses shall not exceed
three-e1ghts an inch in thickness and be-
tween the rings or shells thew shall not
be less than half an inch in thickness.
-: lenters,-lhe upper curve or arch
snail be. formed on strong centers of
correct torn and dimensions according
to the sizes required. The centers shall
not IN any case be struck until per-
mission IS given by the en~ineer and
generally his permission will not be
given until the back filling is I'D to
line at least as high as mid -way between
the sprlnglng line and the crown of the
arch and particular care must be taken
In drawing centers not to injure the
work
IA. 1nverts--All inverts OF bottom
curves are to be worked according to
forms or templets, accurately made to
the dimension of the sewer. set to grade.
and all mortar Or other materials shall
be carefully cleaned out before the CEN
ter OF the arch is set Bricks of the in
To he II, 10 Il
one-half inch thick Flowing water
shall be kept from the inverts until
forty-eight hours after its completion.
IS: Crown of Arch.-The joints
of all work shall be arranged to the sat-
isfaction of the engineer and the key
course shall require to be tapped into
its place with hammer The entire
arch or upper half of the sewer shall be
covered with mortar one-half inch in
thickness
I6. Protection-All fresh work shall
be protected from injury; if any work
is injured in any manner the damaged
part shall be rebuilt at the contractors
expense
CONCRETE MASONRY.
16a. Materials. III cases where
nlans call for sewers constructed of re-
Enforced concrete, specifications hereto
fore given tor cement, sand, broken
stone, and mixing apply.
Forms or Moulds.-The upper portion
Or arch and the lower curve or invert
| is to be moulded in forms, conferred and
braced and conforming accurately to
section of interior of sewer called for on
plans and accurately set to lines and
grade.
How Made.-Matched and surfaced
boards not more than three and one
half inches wide and tongued and grow
ed, and built on centers to conform ex-
actly to section of sewer, are to be used
as the portion of the form against which
the concrete is to be deposited. Forms
are to be constructed with the view of
giving a smooth and perfect surface to
interior masonry of sewer when remov-
ed: and no method OF construction
which will in the judgment Of the en-
gineer fail to produce this result,
will be accepted or permitted.
Facing Mortar.-A mortar composed
OF one ID part Portland cement, con-
forming to these specifications, and two
and one-haH parts of sand by measure
and as much water as will permit OF
| its being handled with troWel, will be
denosited by trowel bucket or such
manner as the engineer may approve, as
facing mortar next TO the forms TOR
depfa of not less than two 12D inches.
How Deposited to this
facing mortar, while mortar is still
| in plastic condition concrete as
heretofore specified will be depos-
tied in such manner as to make
perfect bond with said facing mortar,
and not to ,displace the same; the In
tention being to produce perfect con-
tinuity and bond between the facing
mortar andbody of the concrete
Centers and forms shall not be re
moved till permission is given by the
engineer.
Reinforcing Iron-A1l reinforcing
irons, ties or bindersshaH be accurately
placed so as to be inabedded IN the con-
crete. in accordance with plans On file
in engineers office. All rust and scale
must be removed from same and they
must be thoroughly slushed with water
before concrete is placed around them .
Filling in or Wa1king.-Fllling IN and
walking not permitted TIL approved Ply
PIPE SEWERS.
II. Excavations. - specifications Tor
excavations for brick sewsrs apply to
pire sewers.
IS. Quality OF Pipe-The pipes furn-
ished bv the contractor shall be OF the
best best quality vitrifed stone ware socket
pioes. thoroughly burned. true IN form
and free from warps, cracks and inper-
feotions Of any kind, and shall be well
and smoothly salt-glazed over their IN
ner and outer surfaces.
70. Thickness-No pipe shall have. a
less thickness than one-twelfth of its In
ternal diameter and must be uniform in
thickness. When required curved or
anv other form of pipe shall be turn.
isfed and laid. s. ;,
20. How Laid.-Each pipe IS to be lad
on 4 firm bed and in perfect conformity
with lines and levels given. The bot
tom of the trench under each socket
must be excavated SO as 70 give the pipe
a solid bearing for its entire length.