Evening times-Republican. [volume] (Marshalltown, Iowa) 1890-1923, 1900-08-22
IRON WORK REJECTED
Five Thousand Tons Of Bridge Iron
Sent Back to Eastern
Factory.
Northwestern's Famous Moingons
Bridge Will Be Delayed q
Month Thereby.
Some Interesting Facts Relative to
Its Contradictory ingin.
eering heat

Boone, Aug. 22--NVork on the big dou-
bic track bridge of the Chicago &
Northwestern over the Des Moines riv-.
been under way since early last spring,
has been temporarily suspended because
the steel furnished by the Carnegie Steel
lCompanyof Pittsburg, Pa, was not up
to specifications. Five thousand tons
of this steel were forwarded from the
Carnegie works TO the bridge depart
ment OF the Northwestern at Chicago,
several weeks ago, in expectation that it
would be shipped on to Boone to enter
into the construction of the bridge. Be
fore placing it in the structure, howev-.
Ier, the railroad company subjected it to
Ian experimental test at it's shops in
Chicago and finding it fell far short of
meeting the requirements 5000 tons
We're condemned and the steel company
notified to have it reshippd to Pitts
burg.
TIL tensile strength of the steel was
not nearly that called for by the speci-
] fications, and as the Northwes tern is
expanding 100000 in the construction of
/ the bridge it was rejected because none
| but the best material will be used. Re-
Icentlya the contractor having in charge
the erection of the stone and concrete
pliers. of which there are seventy-two,
upon which will rest the superstructure
iof the approaches from either side of
1 the river to the channel of the stream
Itself, and the four huge caissons for the
ssupport Of the center span. completed
1.-The work. This work Was done under
the personal supervision of Will Haz-
lard. engineer in charge, of Des Moines.
IA soon as the contractor Was ready to
/ Turn the work over to the company the
i Northwestern sent out an expert enein-
4 secr to examine the raaaonly and aacer-
itain if ii had bsen done in compliance
With the plans prepared by the chief
fyengineer of the railroad company The
lexpert, who was from New York city,
8lsGeyotcd one entire day TO going care
fully over the piers caissons and foun-
sEdations Returning TO Chicago the next
sltay he submitted written report, rec
commanding the acceptance of the work.
Z He received check for $4,000 as COM
sEpensation for his sselyices.
The type of bridge is that commonly
known az the steel trestle. consisting of
Il series5of steel bents resting on mason
Iry piers and supporting girder AT the
4 top. These girders are i5 and % feet
Hong, alternating, so that each bent sup
ports one end of 4 45-foot and one end of
La 75-foot grder The two bents under
leach 45-foot girder are rigldly braced
A toge thpr, forming a tower, 90 that u side
1view viii present. the appearance of q
II succession of towers With a 15-foot gir-
Edsr spanning fro,n&one end to the other.
Each of the beiits mentioned consists OF
1.-TWO steel posts leanng toward each 9th
Eer aud braeeG together. They are abou!
ss-vclgiy -five feet apart at the top and
spread TO an eXtreme width OF ninety
fleet al the bottom There are forty OF
these bents. Across the channel of the
river there is a truss span 3e0 feet long
lesting on steel towers in turn support
led on huge cslis,sons of Very different
reconstruction from those supporting the
girdsr spans. The extreme length o,
the bridge is 2.s65 feet and the creates
height above the water 1855 feet. Ths
81 bridge Viii carry double tracks thirteer
feet between centers, and is designed
to carry The heaviest engines ane
loads.
The stone Which is all dressed a!
!nicely as,ho intended to become a par
A 5o! the front OF a puDilc pulicllie, va
taken from the quarries al Mankato
Land the strength of the cement was full
/ I ~ tested before being used. The rejec
itian OF the steel will delay the compile
ton Of tbs bridge about thirty days
The Northwestern expects to nave TIL
/, bridge ready for traffic some time in DC
tober, when The present line from Boon
thru Moingona hollow, with it's expen
siSe grades tp ogden. will be aban
Edoned and a new double track be use.
;between4the towns mentioned. The com
pletion of,he bridge and the cutoff vii
shorten the distance from Boone t
y I5Council Bluffs about five miles.