The Jersey City news. (Jersey City [N.J.]) 1889-1906, 1898-01-26


after a number Of pieces have been dipped
and occasionally the vessel must be entirsly
enptied q its old contents and rehlied WIN
Every casting must attain a Temperature Of
60 spo,, degrees ,Sa s.sF Fsh ds he, ,, before being removes
II may then be slowly removed and aiio"ea
q ss drip - ..s,,an .s,u :. ahmed antil the In
spector pronounces It passed. as TO rust. ham
mer test, etc. when i may then ne aippea.
cious. when cold on the castings. and not nrit-
tie, Or with any tendency to scale or. +asted
and under such pressure the pipe shall be sub
Jected to a series of blows at various points
with a three-pound hammer.
WROUGHT IRON.
All wrought iron used must pc tougn, luz
tile and fbrous, of uniform quality, Tree lroin
crystalline structure, cinders, flaws or crachs;
In bars it must have an ultimate strengtn M
pounds elastic limit, and an elongation of TWEEN
ty..fve per cent. in eight inches; ,a4n
Of $4,000 pounds per square inch, $4,000 pounds
elastic limit, with twenty per cent. elongation
sToNE MASONRY.
Unless otherwise specified. all stone masonry mas
a quality and size satisfactory to the En-
gineer; all points to be full OF mortar. of
stone of suitable size, quality and shape for
the work i3 hand and presenting goed o oars
full of mortar, and no grouting or filing Of
JOINTS after the stones are IN place WI y
allowed. The work must be thoroughly bond
ed.
!, Where rubble stone masonry is used in dams
the stones must have roughly rectangular
forms, and all irregular professions and Iea.ner
peeially must be good and present even sur
faces. When a stone is lowered on the sur
race prepared to receive 1T there must pc ~
doubt that the mortar will fill all spaces. NO
spawls shall be inserted beneath a stone
SO placed, but a moderate quantity may pc
USED IN DreDariup Siittahle surfaces IOf
: celving other stones, If they are entirety en-
must be used and regular coursings be avoia-
ed in order to attain vertical as well as nor.
r z7ont aiab bonding. Spaces Of six inches h or a moas
sionally filled with concrete carefully rammed;
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 and
is to be especially sound. hard and compact
, ana or a durable character. No joint snail pc
: more than one inch wide. The exposed faces
+ Of all masonry dams and gate-charnbers shall
be equal in appearance and quality 70 that
or the Macopin intake dam of the Newark
water works The facing stone masonry shall
: depth of not less than three inches, or more
2 than four inches from the facings. and the
e 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 to be at any point less than twenty-eignt
) inches. The headers are to be not less than
{ four feet in length. each course to be COM
posed of two stretchers and one header alter
nately.
e 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
r made of frst-class granite, free from seams
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
e allowing Of one-quarter inch joint at most.
The stone shall be laid with quarter-ineh joints
t a sar made ma tac Of 'o Clear sa portl Ds p0 eement w'' applied mRsi
before its first setting. All joints to be raked
II out to "a depth of one and one-half inches be-
. It is not intended to compel the use of quar-
ry stone masonry laid in cement where dry
i stone masonry is sufficient, in the judgment
= of the Engineer.
4 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
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
;. Mortar used in concrete core-walls Of earth
Y tunnels, etc. shat! show a tensile strength Of
Of section at the end Of one wees. 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
Rosendale cement and two parts sand, OIL
s. 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 the end Of one week. $50 pounds per square
re inch at the end of one month, and $50 pounds
at the end of six months, and may be com
1t r,ospd of one mart Portland cement to two
n parts of sand, or such other ingredients OF
proportions as will produce a mortar Of the
lie above strength.
l. Mortars used in pointing shall be composed
of neat Portland cement, moderately slow set
ting, and shall show in one week. after set
lie ting two hours in air and the remainder Of
the time in water, a tensile strength of al
Id least $50 pounds per square inch of section.
n When tested in cakes all cement shall be
n free from cracking ats the edges. !.
lie immediate use, and none shall be used which
N has begun to set.
dry. by repeated turns and until the mas.
Or has become homogeneous and of uniform
s. color. A proper proportion of water shall ther
be added and the whole quickly mixed.
D. CONCRETE.
lie The stone shall be broken so that the greater
pc diameter shall not exceed three inches. I
e. shall be sound and clean. The stone shall b'
re wet with water and then thoroughly mixed
re with the mortar in such proportions and man
at ner that all surfaces are covered and all void
filled with mortar, but pd aSds5 more or than t thre e
id mortar. All material must be actually meas
- -, - l.-Jt-
r. Concrete must be Immediately deposited il
or the work after mixing and placed carefully
e. It must not be dropped from a height. I
shall be laid in horizontal layers, not ex
ceeding nine 90 inches thick, and thorough!
1e ramrned until the stone is covered with NOR
es tar and until a film of water appears on thu
s. surface. All surfaces upon which concrete i
laid must be wet before depositing the con
crafe plank or timber forms must be EN-
III niovea where necessary to confine the concret
X r. the shape and dimensions shown in TIL
Sc plans. ,,,cv uvopv
The best quality of whole, new brick, burn
&c cd hard entirely through, free from injuriou
x cracks and with even, true and smooth faces
Mt with 4 crushing strength of 1000 pounds pc
square inch, must be used. Every brick mus
ed he laid in full mortar Joints on bottom, side
and ends. not exceeding three-eighths of al
of ;ro1, thick. All brick work shall be properl.
nd bonded. .prt5 DAMs
tn EARIh DAM3.
" Tho ton soil and all vegetable matter shal
~ re removed from the area to be covered b.
I'd eerth dams. This area shall be cleared, to tn
,fIl rs,noved therefrom, which is sufficiently FIRE
a. from vegetable matter, may afterwards b
Of ,,sad FOR building the outer toe of the dam.
S concrete core-wal1 of a proper thickness
ee Sha,l extend the entire length of the dam an
srnn, fhe high water level down into the mate
Nal underlying the empanknent to sound roc
ne ~ some other impervious material.
n TIVE Earth used in the embankment shall b
n orafr,Iv selected of the best materials. mix
N "a if necessary, to secure imperviousness t
az ue.tar The earth shall be spread upon tn
d, "ahanLment in level layers, not exceeding ST
I'M snabas in thickness, and narrowed, wet dow
~ 1 ro,iad an az to be thoroughly compact.
I anu iOhiS~ - NV. eIo1 49, =