pa1778data.pdf

U.S. STEEL DUQUESNE WORKS
HAER NO. PA-115
(Page 116)
Westinghouse D.C. motors running at 1750 rpm. Each motor is
connected to a Philadelphia gear reducer with a ratio of 20.9 to
I. The tripper is ^-O" wide x 32'-4" long x 16' -10 1/8" long
and travels on railroad tracks, spaced 7 f -5" apart, which
straddle conveyor belt number three. It travels a length of
4991-911 and is powered by an electric rail.
Installation Date: 1957.
G. Tripper Number Two: Manufactured by the Link Belt
Company, tripper number two is the same size and performs the
same function as tripper number one. It travels a length of
988'-10 1/2".
Installation Date: 1957.
II. Trestle:
A. Flux and Sinter Fines Track System: Located just east of
an elevated 3 f -0" walkway which separates the car dumper conveyor
belt system from the trestle is the flux (i.e. limestone and
dolomite) and sinter fines track system. The system begins south
of blast furnace number six and consists of two sets of standard
gauge tracks running side by side at blast furnace number six
before merging into a single set of tracks at blast furnace
number four. From there the track runs north past blast furnace
number one. The tracks run directly over the stockhouse flux and
sinter fines bins and have grated openings between each set of
tracks which allow railroad hopper cars to dump their contents
into the bins. The track system is approximately 1800'-0" long.
Construction Date: 1962.
B. Coke Track System: The coke track system is located 5'-11
1/4" above, and approximately 10*-0" east of the flux track
system on a platform supported by steel columns. The system
begins south of blast furnace number six and consists of two sets
of standard gauge tracks running side by side in a northerly
direction past blast furnace number one. The tracks run directly
over the stockhouse coke bins and have grated openings between
the tracks at each coke bin thereby allowing railroad hopper cars
to dump their contents into the bins. The track system is
approximately 1800'-0" long.
Construction Date: 1919-1924.
C. Car Puller Systems: There are five car puller systems
associated with the trestle. The car pullers are used to tow
railroad hopper cars onto one of the trestle track systems in
order to facilitate the stocking of bins.
1. Car Puller Number One: Car puller number one serves the
stockhouse bins associated with blast furnaces number one and