The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-02-11

Every casting must attain a temperature Of
goo degrees Fahrenheit before being removed
from the vessel OF hot pitch.
to. drip.
spector pronounces Il passed, as to rust. ham
mer test, etc, when It may then be dipped.
The proper coating must be tough and tena-
cious, when cold on the castings, ana not prit-
tie. or with amy tendency to scale off, -,
Every length Of cast iron pipe shall be tested
to q pressure of 800 pounds per square men,
ana under such pressure the pipe shall be sub
Jeeted to a series of blows at various points
with a three-pound hammer.
WROUGHT RON
All wrought iron used must be tough, due
tile and nbr5us, of uniform quality, free from
crystalline structure, %cinders, flaws Or CRACKS;
IN bars it must have an ultimate strengtn q
$1,000 pounds per square inch, with se,vy9
pounds elastic limit, and an elongation OF TWEEN
ty.nNe per cent. in eight inches.
AEgle iron must have an ultimate strength
OF ssioo9 pounds per square inch, sA,vvv p % tion
elastic limit, with twenty per cent elongatioh
IN eight inches.
STONE MASONRY.
Unless otherwise specified. all stone masonry
Is to ne built of sound. clean quarry stone, E OF
glneer; all points to be full CT mortar. =.
bubble stone masonry shall be made OF
stone Of suitable size, quality and shape TOT
the work in hand, and presenting good beds
Tor material of that class. Especial care
H fmI pc taken to have the beds and 1oin y
iui OF mortar, and no grouting or ming u
joints after the stones are in place viii pc
allowed. The work must be thoroughly bond
Where rubble stone masonry is used in dams
the stones must have roughly rectangular
eages must be hammered off. Their peds es-
pecially must be good and present even sur
faees. When a stone is lowered on the sur.
lace prepared to receive it there musS be no
doubt that the mortar will fill all spaces. NO
spawis shall be inserted beneath a stone
so paced, but a moderate quantity may pc
used in preparing suitable surfaces for re-
seixing other stones, If they are entirely EN-
pedued IN mortar. Various sizes OF stone
liuSL De used and rdplJlar rnIrSiQPS be avoid
ed IN order to attain vertical as well as hori-
zontai bonding. Spaces of six inches or more
slonally filled with concrete carefully rammed.
Masonry which is to receive the shock OF
ways. is to be composed of large blocks and
IS TO pc especially sound, hard and compact
more q mar q durable charaeter- No joint sha fac De
OF al masonry dams and gate-ehambers shall
ne equa5 IN appearance and quality to that
water works. The facing stone masonry shall
nave all beds, builds and joints true to a
depth OF not less than three inches, or more
joints snail not exceed one-half inch in width.
the rise of the courses may vary from bottom
TO TOP from thirty inches to fifteen inches, de-
creasing gradually toward the top of the wall,
and the width of the bed of the stretchers is
not TO be at any point less than twenty-eight
inches: The headers are to be not less than
Jour rect in length. each course to be COM
nately.
All face joints shall be raked out to a depth
Oh one and one-half inches and carefully point
ed with Portland cement mortar mixed clear.
Granite dimension stone masonry is to be
USED 1r copings of dams and for the gate
openings in the gate-ehambers. It must be
maze OF f1rst-class granite, free from seams
and other defects The stones shall be cut
to exact dimensions and all angles and
An peds,. builds and joints are to be dressed
for the full depth of the stone to surfaces,
The stone shall be laid with quarterback joints,
ana az race joints shall be pointed with NOR,
Tar MAGE OF clear Portland cement, applied
out TO a depth of one and one-half inches be-
1t is not intended to compel the use of quar-
ry stone masonry laid in cement where dry
stone masonry is sufficient, in the udgment
OF the Engineer.
Ihe contractor shall submit samples of the
ingredients and the proportions thereof to be
used IN mixing mortar for the work, to the
Engineer, a sufficient time in advance of their
use. to permit of suitable tests being made to
forms to the specifications. If, for any cause,
the Engineer finds it impossible to make such
tests, then only SUCH ingredients and proper
tons shall be used as in the opinion of the
engineer will produce mortar conforming to
the specifications.
All sand used shall be clean and sharp, free
from pebbles.
Mortar used in concrete core-walls of earth
dams, in the foundation and main body of
tunnels, ETC., shall show a tensile strength of
at least twenty-five pounds per square inch
y 49, at LIN ~ VI Vic WtShr Ally pOuluS
per square inch of section at the end of one
month, and 125 pounds at the end of six
Rosendale cement and two parts sand. or
such other ingredients or proportions as will
produce a mortar Of the above strength.
the walls of gate-chanibers, in dimension
stone masonry or concrete in unusually expos
ed situations shall show a. tensile strength of
at least 100 pounds per square inch of section
at the end of one week, $50 pounds per square
inch, at the end of one month, and 25o pounds
at the end of six m0nfhS- and NAV he onpa.
posed of one part Portland cement to two
parts of sand. or such other. ingredients or
above strength.
Mortars used In pointing shall be composed
of neat Portland cement, moderately slow set
ting. and shall show in one week. after set
ting two hours in air and the remainder of
the time in water, a tensile strength of at
least $50 pounds per square inch of section:
When tested in cakes all cement shall be
free from cracking at the edges.
No mortar shall be mixed in advance of its
immediate use, and none shall be used which
has begun to set.
Cement and sand shall be thoroughly mixed
dry. by repeated turns and until the mass
has become homogeneous and of uniform
color. A proper proportion of water shall then
be added and the whole quickly mixed.
CONCRETE.
The stone shall be broken so that the greater
diameter shall not exceed three inches. It
shall be sound and clean. The stone shall be
wet with water and then thoroughly mixed
with the mortar in such proportions and man
ner that all surfaces are covered and all voids
fIed WITH I1OTldI,M u IO HlIlOTG IMAM three
parts of stone shall be added to one part of
mortar. All material must be actually. meas
ured in bulk.
the work after mixing and placed carefully.
1t must not be dropped from a height. 1t
shall be laid in horizontal layers, not ex-
ceeding nine 10y inches thick, and thoroughly
rammed until the stone is covered with NOR
tar, and until a film of water appears on the
surface. All surfaces upon which concrete is
laid must be wet before depositing the con-
crete. Plank or timber forms must be em-
nloyed where necessary to confine the concrete
to the shape and dimensions shown in the
plans. ,
The best quality of whole, new brick, burn
cracks, and with even, true and smooth faces,
with a crushing strength of 1000 pounds per
square inch, must be used. Every brick must
be wet by immersion before laying and must
he laid in full mortar joints. on bottom, sides
and ends. not exceeding three.eighths of an
inch thick. All brick work shall be properly
bonded.
The top soil and all vegetable matter shall
he removed from the area to be covered by.
earth dams. This area shall be cleared, to the
of the Engineer, and the material
renewed therefrom, which is sufficiently free
from vegetable matter, may afterwards be
used for building the outer toe Of the dam.
shall extend the entire length OF the dam and
from the high water level down into the mate
rial underlying the embarrassment to sound rock
THE earth used in the embanknent shall be
carefully selected of the best materials. mix
ed es Ter Tbe earth shall be spread upon the
in level layers, not exceeding six
inches in thickness, and narrowed, wet down
nj rolled SO as to be thoroughly compact.
:, me slopes Of entertainments shall not be
steener than one foot rise to two foot base;
they shall be finished true and smooth and
on the water side with suitable
10 wing and on the other side either by paw
ing or by dressing. with six inches of soil,