Butte record. (Bidwell, Butte County, Cal.) 1853-1858, 1855-03-10

tfcLt-U az DEfe Jtts, b1t<c cSAHt9, OUt-
ifornsa, for the Bid,seit Bridge Com
pqay-
The Bridge nay have a span of two hun
bred and forty feet. measured in straight
line from pier to pier. There are to be four
wire cables, two on side. about two inches
apart. On the same plane Each cable to con-
tain three hundred 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
icompactly 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 oil, boiled with
a small portion of liherage and lamptlaek =
Each cable is to raped spirally with wire
tightly Each cable before being placed TO its
position, Is to receive thick coating of :hc
foregoing preparation Of linseed oil &c, aud
finally painted with wife lead paint. Each OF
said cables when placed in its position, to have
the same sine and Yersipe- The swag Of
each cable to be not less than twelve feet
The cables at each end are to run over tow
ers, aud resting on east iron saddles, the same
as hereinafter mentioned, running back with
versine to the tower. twenty feet, en- to the
point, where they strike the anchorage, each
being fastened to different anchorage on the
SANE line, on the same plane, and making
equal versines The anchorages are to We
wrought iron bars, iInbedded securely to the
best advantage 10 the bed rock, thai each
anchorage Will bear a pressure or pull 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 adjusting screw or
keys, in the most approved manner, having a
strength equal to, OF greater than each cable.
The suspension claims are to be of number
ten wire, and about three. fourths of an inch
in diameter, each wire to be tested and paint
ell 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
Bile securely. The saddle and suspending
chains on each able are to be apart alternate
ly seven feet, measuring from the centre Of
each saddle through the entire span, making
the road way bearers three and-a-half feet
apart. The saddles on each cable are Is 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 tasten-
cd securely to a stirrup that shall clasp the
tranversal road bearers The stirrups at the
suspending points TO be made with an impress
sion at the point Of suspension, to receiTe the
chain. These chains from the point of sus-
pension are to have a slight and uniform obi
putty 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 ieveled and solid Each
abutInent might be thirty feet long, ten feet
wide, and twelve feet high, where the road
way passes above high warter marx. That
particular portion of the pier which is design
ed to support the towers. if the same shall be
built Of cast iron-shall be raised about one
loot above the roadway. These abutments
shall have 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 OF all sides
The stone is to be layed in 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, cast iron or
stone They shall each be composed of four
east iron columns, igclining inwards at the
top. and their base resting on. and fastened to
a tabular iron plate Of sufficient size and
strength. Said plate thall be anchored to 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 ut the top to each other by an iron
bar of sufficient strength. Said cross bar
to have iron bracse connecting it 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 on rollers on the top Of the towers so
that tie cables can accommodate themselves
The same to be done securely. They to be
sixteen feet high and bear 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 at
the top by a cross-bar of iron or timber, and
hraced 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
Inability. 1t is to be crowned at the centre
about two feet The road bearers are to be
FIVE by teninehes. and not less than TWEEN
ty feet long, excepting every sixth one, which
small not De less tHlH t-euty ave aHu-h-n nan
feet The road bearers arc fastened to the
suspending chains bp 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 thici. by not less
than twenty-five feet long, upon which flooring
there shall be a second flooring of the same
thickness and dimensions, layed in cross di
agonal to the first. each to be thoroughly
spiked. Inside of the suspendiug chains a
piece of timber two by eight inches shall be
layed the length Of the roadway, 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 a 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 anda-half feet run,
screwed together with iron rods; also, iron
straining rods, connecting the upper cord Of
the parapet with the roadbearers, and the