The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-29


after d number Of pieces have been dipped;
fresh pitch must therefore be frequently added,
and occasionally the vessel must be eHtireiy
fresh pitch.
800 degrees Fahrenheit before being remover
from the vessel OF hot pitch.
y may then be slowly removed and allowed
But no casting shall be dipped until the In
spector pronounces 1t passed, as to rust. nam
mer test. ETC., when it may then be dipped.
cious, when cold on the castings. and not prit-
ne. or with any tendency to scale on.
to a pressure Of 300 pounds per square men,
and under such pressure the pipe shall pc sup.
1ecled to a series Of blows at various points
with a three-pound hammer.
WROUGHT IRON.
All wrought iron used must be tough, DUO
tile and hbrous, Of uniform quality, Tree lroin
In bars 1t must have an ultimate strength OF
ao,goo pounds per square inch, with ze,Ueg
pounds elastic limit, and an elongation OF TWEEN
ty.nve per cent. in eight inches.
AEgle iron must have an ultimate atrengln
81 81 sS;ooy pounds per square incn, 4a'o eson putii
STONE MASONRY.
Unless otherwise specified, all stone masonry
Is TO be built of sound, clean quarry stone, ol
a. quaiity. and size satisfactory TO the En-
gineer; all points to be full of mortar.
hubble stone masonry shall be made OF
stone Of suitable size, quality and shape. 1of
the work IN hand, and presenting good neqs
Tor material Of that class. Especial care
must be taken to have the beds and joints
i iuil 81 mortar, and no srouting OF MINI, m,mI b pa
JOINTS after the stones are in place VIII pc
allowed The work must be thoroughly nona-
Where rubble stone masonry is used in dams
the stones must\ have roughly rectangular
forms. and all irregular projections and featner
edges must be hammered off. Their beds es-
pecidIly must be good and present even sur
faces When a stone is lowered on the sur
race prepared to receive 1t there must be no
spawls shall be inserted beneath "a stone
SO placed, but moderate quantity may pc
used in preparing suitable surfaces for re-
ceiving other stones, if they are entirely en-
bedded in mortar. Various sizes OF stone
must be used and regular coursings be avoid
ed IN order to attain vertical as well as nori-
zonta! bonding. Spaces of six inches or more
IN width between the stones may be occa-
sionaliy flled with concrete carefully rammed
Masonry which is to receive the shock OF
water and ice, such as on the aprons Of spill,
m"ys' I , 70 pc composed OF large piocAs any
IS 10 pc especially. sound, hard and compaee
and OF a durable character. No joint shall be
more than one inch wide. The exposed faces
OF an masonry dams and gate-chambers shail
be equal in appearance and quality to that
OF the Macopin intake dam of the Newark
water works. The facing stone masonry shall
have all beds, builds and joints true to a
depth of not less than three inches, or more
than four inches from the facings, and the
joints shall 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-
and the width of the bed of the stretchers Is
not 70 pc at airy point less than twenty-elght
lucHeS. Inc headers are to be not less imam
four feet in length, each course to be COM
posed OF two stretchers and one header alter
All face joints shall be raked out to a depth
of one and one-half inches and carefully point
ed with Portland cement mortar mixed, clear.
Granite dimension stone masonry is to be
used for copings of dams and for the gate
openings IN the gate-chambers. It must be
and other defects The stones shall be cut
to exact dimensions and all angles and
ARISES shall be true. well defined and sharp,
All DodS n1jld and nfn drn I n ha dr6GSP6
for the full depth of the stone to surfaces,
allowing Of one-quarter inch joint at most
The stone shall be laid with quarter-inch joints,
and all face Joints shall be pointed with NOR
tar made OF clear Portland cement, applied
before its first setting, All joints to be raked
out 10 a depth of one and one-half inches be-
fore pointing.
1t is not intended to compel the use of quar-
~ stone masonry laid in cement where dry
stone masonry is sufficient, in the Judgment
Of the Engineer.
The 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
determine whether the mortar so made con-
the Engineer finds it impossible to make such
tests, then only such ingredients and proper
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
masonry dams, in the concrete backing of
tunnels, etc, shall show a tensile strength of
at least twenty-five pounds per square inch
of section at the end Of one week. fifty pounds
per square inch of section at the end of one
month, and 125 pounds at the end of six
months. and may be composed of one part
such other ingredients or proportions as will
produce a mortar Of the above strength.
Mortars used in the brick lining of tunnels,
the walls Of gate-chambers, 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 $50 pounds
at the end Of six months, and may be com
posed of one part Portland cement to two
parts of sand, or such other ingredients or
proportions as will produce a mortar of the
above strength.
Mortars used in pointing shall be composed
of neat Portland cement, moderately slow set
ting two hours in air and the remainder of
the time in water. a tensile strength of at
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.
+
The stone shall be broken so that the greater
diameter shall not exceed three inches. 1t
shall be sound and cream. Inc 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
filled with mortar, but not more than three
parts of stone shall be added to one part of
mortar. All material must be actually meas
ured in bulk.
Concrete must be Immediately deposited in
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 90 inches thick, and thoroughly
ramnled until the stone is covered with NOR
surface. All surfaces upon which concrete is
laid must be wet before depositing the con-
crete. Plank or timber forms must be en-
Moved where necessary to confine the concrete
to the shape and dimensions shown in the
plans. ,uoDY
aThe best quality of whole, new brick, burn
ed hard entirely through, free from injurious
cracks. and with even, true and smooth faces,
with a crushing strength OF 400 pounds per
he wet by immersion before laying and must
be laid in full mortar joints on bottom, sides
and ends, not exceeding three-elghths of an
inch thick. All brick work shall be properly
bonded. e
The top soil and all vegetable matter shall
he removed from the area to be covered by
eart, dams. This area shall be cleared, to the
satisfaction of the Engineer, and the material
removed therefrom, which is sufficiently free
from vegetable matter, may afterwards be
ised for building the outer toe of the dam.
4 concrete core-wall of a proper thickness
shan extend the entire length of the dam and
from fine high water level down into the mate
vial underlying the embankment to sound rock
or some other impervious material.
The earth used in the embankment shall be
carefully selected of the best materials, mix
cd ~ necessary, to secure imperviousness to
water. The earth shall be spread upon the
ENHANCEMENT in level layers, not exceeding six
- rolled so as to be thoroughly compact.
The slopes of embankments shall not be