The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-02-08

But no casting shall be dipped until the IN
The proper coating must be tough and tena-
lie. 81 saeR any sn:q t sah sas Sa to scale Off Il.
Every length of cast iron pipe shall oe testsa
and Z u nassss sI,cb e ey go pounds nd a, pee s saYfr g. ia ssb.
jected TO a series Of howsf at yariops poinis
with a three-pound hammer.
WROUGHT IRON.
All wrought iron used must be tough. due
tile and fbnous, of uniform quality, fFee from
crystalline structure, cinders. flaws or cSac#ss
n Y : bars It must have an ultimate strenesa6a o oa
pounds elastic limit, and an elongation Of TWEEN
Angie pr iro cent mu5 u s sasat an lneh Ultimate strength
elastic limit, with twenty per cent. eiongati0n
In eight inches.
STONE MASONRY.
Unless otherwise specified, all stone masonry
Is to be built Of sound, clean quarry stone, OF
sineer; all points to. be full OF mortar.
Bubble stone masonry shall be made OF
the work in hand, and presenting good beds
Tor material of that class. Especial care
must be taken to have the beds and ,oinos
iull OF mortar, and no %grouting or ming OF
joints after the stones are in place Will pc
allowed, The work must be thoroughly bond
Where rubble stone masonry is used in dams
me stones must have roughly rec1angu.ar
edges must be hammered off. Their beds es7
peciafly must be good and present even sur
races. When a stone is lowered on the sur,
race prepared to receive it there must be no
doubt that the mortar will fill all spaces. NO
spawls shall be inserted beneath a stone
50 placed, but a moderate quantity may pc
used in preparing suitable surfaces for re-
eeivlng other stones, If they are entirely EN-
must be used and, regular coursings be avoid
ed in order to attain vertical as, we'll as hori-
e aidt bonding: Spaces Of slS inches or more
sionally filled with concrete carefully rammed:
Masonry which IS to receive the shock OF
water and icee such as on the aprons OF Spill,
ways, is to be composed of large blocks and
is 70 pc especially sound, hard and compact
more than one inch vide. The exposed faces
OF all masonry dams and gate-chambers shall
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 snail not exceed one-half inch in width.
to top from III thir fyo inches ma ts sfteen lr inches eo'f de-
creas1ng gradually toward the top of the wall,
and the width of the bed of the stretchers is
not 70 be at any point less than twenty-eight
inches The headers are to be not less than
TOUR rect IN length, each course to be COM
nately.
All face Joints shall be raked out to a depth
OF one ana one-half inches and carefully point
Granite dimension stone masonry is to be
used for copings Of dams and for the gate
openings IN the gate-chambers. 1t must be
and other defects The stones shall be cut
ARISES shall be true, well defined and sharp.
All beds. builds and joints are to be dressed
FOR the full depth of the stone to surfaces,
alloWlng OF one-quarter inch joint at most.
The stone shall be laid with quarterback Joints,
and all face joints shall be pointed with NOR
before its first setting. All joints to be raked
cut to 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
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
determlne whether the mortar 50 made con-
forms to the specifications. Elf, for any cause,
the Engineer finds it impossible to make such
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
months, and may be composed of one part
Rosendale cement and two parts sand, or
such other ingredients. or proportions as will
iOdoSS q mo- u VI Lie -SlItllStt. q
Mortars used in the brick lining of tunnels,
the walls of ga~te-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
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
When tested in cakes ali 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
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. 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
parts of stone shall be added TO one part of
mortar. All material must be actually meas
Concrete must be Immediately deposited in
the work after mixing and placed carefully.
1 l1SJ HUI LDe llOlli d IEH e. LII
shall be laid in horizontal layers, not EEK
ceeding nine t9l 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-
Moved where necessary to confihe the concrete
10 the shape and dimensions shown in the
plans. n,,c1r uropp
The best quality of whole, new brick, burn
cd hard entirely through, free from injurious
cracks. and with even, true and smooth faces,
with a crushing strength OF 1000 pounds per
he wet by immersion before laying and must
he laid in full mortar joints on bottom, sides
and ends. not exceeding three7eiglths of an
inch thick. All brick work shall be properly
ponaeu. EARTH DAMS.
The ton soil and. all vegetable matter shall
esrt, darns. This area shall be cleared. to the
satisfaction Of the Engineer, and the material
removed therefronn, which is Sufficiently free
from vegetable matter AZ p,ta MAY X affe tE be
4 concrete core-wall of al proper thickness
shall extend the entire length of the dam and
from the high water level down INTO the MATE
or some other impervious material.
The earth used in the enbarkment shall be
carefully selected Of the best materials, mix
rrstar The earth shall be spread upon the
ENHANCEMENT in level layers, not exceeding Six
inches. in thickness "a ana harroM &C. vet down
ai Tba sloues Of embankfhents shall not be
steeper than one foot rise to two foot base;
they shall be finished true s,a and smooth and
5bay;nS and on the other side either by pay
tins or by dressing, with six inches OF soil,
ana sodding or seeding With grass seed ac-
Ssp UP.
when the work Is completed. all gate-cham-'
bers,. gateheuses, effla vent, pipes pl /. Or eulyerts.