The evening Argus. [volume] (Rock Island, Ill.) 1861-1871, 1870-10-14
THE New Bridge.
Contract awarded for tho Super.
structure to the Baltimore
Bridge 0o.-0ost Of Con-
struction S46o, 900.

The contract for the superstructure mas
been awarded to the Baltimore Bridge Com
pany (Smish, Latrobe & Co.. represented
BY Charles S. Smith, Esq. The Baltimore
COMPANY were not the lowest bidders, but
Thai, n,ono.i,ion was considered the best by
tho Government. There were four other
hid. made for the work, Boomer. of Chicago,
s432, 600; Phenixville Bridge Co, re- ,
5l9, 900; Keystone Bridge Co., Pa.' s4oa'-
900; Detroit Bridge Co., $4,000. BY the
terms of the contract the work OF constfue'
t;on mu.t be commenced ut once and com
nl.,sd With a. little delay IS possible.
The following are the specifications of
the contract: The superstructure will consist
of five permanent spans, one of 26o feet, one
of 26I and three of 220 feet each, and one
draw span with two openings of l6O feet,
and Q total length of 500 feet.
Each span will consist of two trusses, 33
feet between centres of top and bottom
chords, and single track railroad intermedi-
ate, allowing IL feet headwsy for wagon
road. The trusses to be placed Is feet apart
10 the clear with two sidewalks each tive
feet wide outside on lever with the wagon
road floor. All the spans to be built entirely
| of wrought iron, the material to be of the
soug hest and best qu.lisy, free from scales
busters and other imperfecsions. Before
being used, it shall be tested by hydraulic
nj
per square inch of sectional area,
and if either of the bars tested break the
whole lot shall be rejected Before being
placed IN the bridge ell the wrought iron
shall be tested to twenty thousand pound.
per square inch of section, and to be
rejected if showing . permanent set Oh
extension of one-one thoussnd three
hundred and fifteenth part ofits length. The
floor beams must stand q strain of 5000
pounds per square inch. No bar of iron
having an error 10 length between pin holes
Of one thirty second of An inch or in the diam
eter of pin hole over one hundrsth of an inct
shall be allowed. The draw pier or turn
table, must work by steam as well as hand
power. The width of the bridge from out
to out of sidewalks not to be over "a feet
the railing of sidewalk to be three feet and
six inches high, and strong enough to rssis
considerable pressure from a crowd. AL
iron work is to be painted before being
exposed to the weather. All joints covered
with one coat of white lead and tsllow
mixed. The turn table is to be so con
s,ructed that on signal it can be thrown &c
its place and ready for the passage of trains
and wagons in tuo minutes. The stringers
of the lower floor to be 31l2 inches, placed
two feet apart, to be covered withtwo layer
of two inch oak for wagon floor, one layel
for sidewalk. Guard pieces of six inche!
high will be placed on the wagon floor
| The floor of the railroad track is to be plank
ed, the portion between the rails to be pro
secsed by metallic sheesing The entire
bridge is to be painted with two coats. after
the bridge is raised.
| From the above We judge that Uncle
| Sam will be satisfied with nothing but . fira
class Job. 1t Is expected the contractor,
will commence putting up the superstruc
ture by Decent Der, but tina. depends on the
completion of the piers.