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• U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 191) of the hot topping platform located inside of the building. The building's monitor roof is supported by Fink trusses. Running through the center of the building's interior, for nearly its entire length, is an approximately 12 f -0" wide x 10'- 0" high hot topping platform. The platform is serviced on either side by a 25-ton E.O.T. crane. Construction date: 1907. III. Hot Metal Shed: The hot metal shed is made up of a one story, approximately 10 f -0 H wide steel framed, corrugated metal lean-to attached to the eastern wall of the BOP shop. Laid out on a north-south axis, a standard gauge hot metal track extends through the length of the building. A car puller system is located between the hot metal rails. The car puller moved "submarine" ladle cars into the shed so that the molten iron could be re-ladled at one of the hot metal transfer pits. Construction date: 1963. IV. Basic Oxygen Process Building (BOP Shoo): Built by the American Bridge Company, the BOP shop is located near the shoreline of the Monongahela River at the northern end of the upper works. Laid out on a north-south axis, the steel framed, six story building is 265'-0" wide x 725'-0" long. It is built on a concrete foundation and has a corrugated metal exterior. The building's gable roof and butterfly monitor is supported by two different types of trusses. The gable on the western side is supported by an arrangement of equally spaced steel I-beams extending downwards from the underside of the roof which are welded to Warren trusses. The gable on the eastern side is supported by Pratt trusses made of welded construction. The BOP shop is divided into four aisles—the charging aisle, the furnace aisle, and two teeming aisles. A. Charging Aisle: The 90'-0" wide x 725'-0" long charging aisle makes up the ground floor of the far eastern bay of the building. The charging facilities are serviced by two 300/75/25- ton E.O.T. cranes. 1. Hot Metal Transfer Pits: Located near the middle of the aisle along the eastern wall, adjacent to the hot metal track are two 18'-8" wide x 49'-2 1/4" long x 21'-0" deep re-ladling pits spaced approximately 70'-0" apart. Each pit has a fume hood leading up through the eastern wall of the building to where a bag house used to be. A small control room is adjacent to each pit on its northern side. 2. Scrap Transfer and Weighing Facilities: Three standard gauge tracks used for bringing in scrap-filled gondola cars,
U.S. STEEL DUQUESNE WORKS HAER No. PA-115 (Page 192) extend through an entrance at the southern wall of the aisle. Three scrap boxes, each with a 1500 cu. ft. capacity, and a 100- ton Ametron platform scale upon which the scrap box sits while it is being filled are located along the western side of the aisle near its southern end. 3. Charging Ladles and Cinder Pots: Sitting on the floor at the northern end of the charging aisle are four 175-ton charging ladles and seven 22-ton cinder pots. B. Furnace Aisle: The 45'-0 H wide x 525'-0" long furnace aisle makes up the near eastern bay of the building. It is six stories high. A steel framed stairwell is located at the northern end of the aisle. 1. Ground Floor: a. Hot Metal and Slag Transfer Cars: One hot metal and one slag transfer car are located on a wide gauge track which extends from the near western teeming aisle to the charging aisle directly underneath each basic oxygen furnace (numbers one and two). Each hot metal transfer car moves to a point underneath its respective furnace from the teeming aisle, while each slag transfer car travels to a point underneath its respective furnace from the charging aisle. b. Motor Control Centers: Located just north of the wide gauge hot metal and slag transfer tracks at each furnace is a one story, 25'-0" square, steel framed concrete block building. Each building contains a motor-generator set and several switch boxes controlling the motors associated with each furnace. 2. Operating Floor: The operating floor is a 86 f -0" wide x 450'-0" long steel framed platform located 32'-6" above the ground floor and 75'-0" south of the northern wall of the charging aisle. Centered on the centerline of the furnace aisle, the platform extends out into the charging aisle on its eastern side and into the teeming aisle on its western side. a. Basic Oxygen Furnaces: Located along the longitudinal centerline of the furnace aisle are two 170-ton furnaces manufactured by Pecor. Furnace number two is located 50 l -0" south of the northern edge of the operating floor; furnace number one is located 100"-0" south of furnace number one. Each furnace is connected by a trunnion to a motor/drive assembly located just north of it. b. Main Control Buildings: A one story, 20*-8" square concrete block building is adjacent to each furnace on its southern side. The building houses the main controls for furnace
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FART THREE: 1946-1988 U.S. STEEL DU
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seeks to develop it into an industr
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Installation Date: 1955. U.S. STEEL
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cooling tower has a capacity of 190
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* * tunnel beneath the clarifier. I
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dumped. Construction Date: 1957. U.
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