The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-02-05


Every casting must attain a temperatures of
300 degrees Fahrenheit before being removed
from the vessel or hot pisch.
It may then be slowly removed and allowed
to drip.
But no casting shall be dipped until the In
speetor pronounces it passed, as to rust nam
Inc proper coating must be tough ana M ~
eious, When cold on the castings, and not ofn-
: Ev : w isns ahy - sen J ss sryan e o, sea, shsil be tested
to a pressure Of 800 pounds per square men,
and under such pressure the pipe shan be a SUP
Jected to q series of blows at various points
with a three-pound hammer.
WROUGHT IRON.
All wrought iron used must be tough, aue,
tile and flbrous. Of uniform quality, Tree IrpAi
crystalline structure, cinders, flaws or eraehs:s
N pars 1t must have an ultimate strenss "a no No
pounds elastic limit, and an elongation OF TWEEN
'ty-hve per cent. in eight inches.
Of 1e d deo iron po,,nd must Z have a an ,n m,siin % 600 pounds
elastic limit. with twenty per cent. eiohsatioh
in eight inches.
sTeNE MASONRY.
Unless otherwise specified, all stone masonry
is to be built Of sound, clean quarry stone, OF
a quality. and size satisfactory to the En-
elpeer; all points to be full OF mortar.
stone of suitable size, quality and shape for
for more al n "a thai aha c Rsssen-i Especial care
must be taken to have the beds and JOINTS
i ioints 81 a mortar he and no r IN n, ar h, viii be
allowed. The work must be thoroughly Dohaz
e1. r.
Where rubble stone masonry is used in dams
the stones must have roughly rectahgulal
forms, and all irregular projections and featner
edges must be hammered off,, Their beds es-
pecially must be good and present even sur
faces. When a stone is lowered on the SUI.
race prepared to receive it there must De NJ
spawls shall be inserted beneath a stone
SO placed, but a moderate quantity may pc
ceiving other stones, if they are entirely en-.
bedded in mortar. Various sizes OF stone
ed N order to attain vertical as well as nor.
zontai bonding. Spaces of six inches OF more
m width between the stones may De oeea-
slonally filled with concrete carefully rammeu:
Masonry which is to receive the shock OF
water and ice, such as on the aprons OF spill,
ways, is to be composed of large blocks ana
is to be especially sound, hard and compact
and OF a durable character. No joint snail De
more than one inch wide. The exposed faces
of all masonry dams and gate-chambers shall
os equal IN appearance and quality 70 tilat
OF the Macopin intake dam OF the newark
water works. The facing stone masonry snail
nave all beds, builds and joints true TO q
depth of not less than three inches, or more
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-
creasing gradually toward the top of the wall,
and the width. of the bed of the stretchers is
not 70 De nat at any point less than twensy-e Ign
four rect 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 eopings of dams and for the gate
openings in the gate-ehambers. 1t must be
made of frst-class granite. free from seams
and other defects The stones shall be cut
to exact dimensions and all angles, and
All beds. builds and joints are to be dressed
for. the full depth of the stone to surfaces,
The stone shall be laid with quarter-inch joints,
ana all race joints shall be pointed with NOR
before its first setting. All joints to be raked
out to a depth of one and one-half inches be-
fore pointing.
1t is not intended to compel the use of quar-
ry stone masonry laid in cement where dry
stone masonry is sufficient, in the judgment
of the Engineer.
The contractor shall submit samples of the
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
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 1875 pounds at the end of six
months, and may be composed of one part
Rosendale cement and two parts sand, or
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, lso pounds per sa sa,iare
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, 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
Cement and sand shall be thoroughly mixed
dry, by repeated turns and until the mass
has become homogeneous and Of anlf . ?
be added and the whole quickly mixed.
CONCRETE.
The stone shall be broken SO that the greater
diameter shall not exceed three inches. 1t
! 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
filed with mortar. but not more than three
DATtS OIL SlOlle 6lldi Ot attdCb 10 Olt part IL
| 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 () 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 en-
nloved where necessary to~confne the concrete
to the shape and dimensions shown in the
plans. ,,,rcv u,opE
The best quality Of whole, new brick, burn
ed hard entirely through, free from injurious
| cracks. and with even, true and smooth faces,
viii 4 crushing strength of 1900 pounds per
sauare inch, must be used. Every brick must
he 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
Dohaeu- EARTH DAMS
The top soil and all vegetable matter shall
he removed from the area TO be covered by
serth dams. This area shall be cleared, to the
car;sfactiou Of the Engineer, and the material
ran,oved therefrom, which is sufficiently free
from vegetable matter, may afterwards be
mead for building the outer toe of the dam.
4 concrete core-wall of a proper thickness
sball extend the entire length fpf the dam and
From the high water level dow into the mate
rial underlying the embankraent TO sound rock
o. some other impervfous- material.
Tha earth used in the embankment shall be
earefulIv selected of the best materials, mix
al If necessary, 10 secure mperviousness to
ne5ter The earth shall be spread upon the
enshankuent in level layers, not exceeding six
s,n,,ns in thickness, and narrowed, wet down
and rolled so as to be thoroughly compact.
Trbe slopes of embankments shall not be
49, elhaIi be finished true and smooth and
a n on the water side with suitable