Butte record. (Bidwell, Butte County, Cal.) 1853-1858, 1855-03-17

| Jornaa, for tie BIdtceA Bridge Com.
pany.
The Bridge may have span of two hun
dred and forty feet, measured in straight
line from pier to pier There are TO be four
wire cal les, two on side, about two inches
apart. IN the same plane. Each cable to CON
| tain three buudrei wires, size number ten
each wire in said cables to be first stretch
ed, tested. and freed from kinks, and if of the
proper strength, to be then layed together
compactly, giving to each wire in position. the
same tension Each wire, before they shall
have been made into the cables, shall be dip
ped several times into linseed ell, boiled with
Il small portion of htherage and lampblaek =
Each cable is to raped spirally with a wire
| tightly. Each cable before being placed to its
position, is 20 receive thick coating of The
foregoing preparation of lnseed oil &c, and
finally painted with wife lead paint. Each OF
said cables when placed in its position, to have
the same sine and yersine. The swas of
each cable to be not less than twelve feet.
The cables at each end are to run over tow
ers, and resting on east iron saddles, the same
as hereinafter mentioned, running back with
q versine to the tower, twenty feet, on to the
point, where they strike the anchorage, each
being fastened to different anchorage on the
same line, on the same plane, and making
tiuil ftISiIcs Inc encourages dTe " ~
wrought iron bars, imbedded securely TO tie
best advantage in the bed rock, SO tina. each
anchorage will bear pressure or pul! in the
direction of tho cables. equal to one hundred
tons, the same to be done in the best and most
durable manner. Each cable is to be fastened
to the anchorage by an adjusting screw or
keys, in the most approved manner having a
strength equal to, or grester than each cable
The suspension chains are to be of number
ten wire, and about three fourths of an inch
in diameter, each wire to be tested and paint
ed as those in the cables. Said chains are to
be fastened alternately to each cable They
are to be fastened at the top to their respect
i've cables, by an iron saddle clasping the Ca
bic securely. The saddle and suspendng
chains on each cable are to be apart alternate
~ seven feet, measuring from the centre of
each saddle through the entire span, making
the roadway bearers three and-s-haif feet
apart. The saddles on each cable are to be
fastened one to the other in a suitable manner.
by number seven wire tapping its respective
cable three or more times between cash saddle
The chains at the lower ends are to be fasten-
ed securely to a stirrup that shall clasp the
tranyersal road bearers The stirrups at the
suspending points to be made with an impress
sion at the point of suspension, to receive the
chain. These chains from the point of sus-
pension are to have slight and uniform obi
guilty towards the longitudinal axis of the
Bridge. as well as towords the centre of the
curve.
ABUTMENTS OR PIERS,
There is to be one on each side Of the river
about two hundred and forty feet apart Its
foundation is to be ievelel AMI solid. Each
abutment might be thirty feet long, ten feet
wide, and twelve feet high, where the road
way passes above high warter mark That
particular portion of the pier which is design
ell to support the towers. if the same shall be
built q cast iron-shall be raised about one
foot above the road way. These abutments
shall have a groove ON their face towards each
other, of the proper Dimensions and quality
for the road way to abut against.
These abutments or piers shall be constructed
Of the strongest and best quality of stone
within one half mile of the site of said Bridge
The same is to receive batter on all sides
The stone is to be layed III hydraulic cement
and grouted. The cement to be the best and
most durable The work to be dressed Rub
Die Masonry.
There Shall be four towers east iron or
stone. They shall each be composed of four
east iron columns, inclining inwards at the
tep and their base resting on. and fastened to
tabular iron plate OF sufficient size and
otAtA- IL A1sl+N liGtG iIdiI De Gu 10 the
pier. The columns at the top shall be firmly
united to each other, and so Constructed that
The towers on the same side, can be firmly
fastened at the top to each other by an iron
cross bar Of sufficient strength. Said cross bar
10 nave iron bracsc connecting 1t with the
towers. Each tower to be constructed with
view to fasten the cast iron saddles, over which
each cable is to pass The saddles are to be
seated III rollers on the top of the towers
that tie cables Can accommodate themselves.
The same to be done securely. They are to be
sixteen feet high, and bear a pressure of nine
~ tons.
If the towers should be constructed with
stone. they are to be sixteen feet high and
sufficiently strong to bear pressure OF ninety
tons, with proper batter, TO be connected al
the top by cross-bar of iron or timber, and
braced to the towers. The tops shall receive an
iron plate made fast and permanent to the
tower, to which shall be fastened the cast iron
saddles made as aforesaid
The road way is to be eighteen feet in the
clear, and the timber used shall be Yellow
Pine, or other timber Of equal strength and
dun ability. 1t is TO be crowned at the centre
about two feet The road bearers are to be
FIVE by teninches, and not less than TWEEN
ty feet long, excepting every sixth one, which
shall not be less than twenty five and-a-halt
ieeI. Inc ROAD bearers are fastened 10 the
suspending chains hp stirrups as heretofore
described, and shall at least be one for every
chain. three and half feet apart The road
way bearers shall be covered diagonally with
plank two and -a-half inches thick by not less
than twenty five feet ling, upon which flooring
there shall be second flooring Of the same
thickness and dimensions, layed in cross di-
agonal to the first, each to be thoroughly
spiked. Inside of the suspending chains a
piece of timber two by eight inches shall be
layed the length of the road way, which shall
be fastened by iron bolts to every fourth road
bearer.
THE PARAPET
Shall be constructed on the principle Of
Towns Lattice. The upper cord shall be a
curve with crown of not less than five feet
above the crown of the Bridge. The cords
shall be two by eight inches, with diagonal
braces, with three and a-half feet run,
screwed together with iron rods; also, iron
straining- rods, connecting the upper cord Of
the parapet with the road bearers, and the
same screwed together firmly. The circular
cords of the parpet at each end to be securely
anchored isto the stone abutments. The road
bearers that are twenty-five and-a half feet
long, are to be braced at each end to the para
pet, to prevent any outward pressure of the
parapet There is to be a corresponding mum.
Der on the inside. The parapet is to be built