A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
200-ton pre-built headframe moved into position over shaft
Erection of permanent steel headframe for New Jersey Zinc Co over new Friedensville mine shaft near Bethlehem, Pa was performed by moving and setting old steel structure; last step in positioning of permanent headframe was lowering it over anchor bolts on foundation; this was done with 30 screw type jacks operated in unison. (See also Eng and Min J v 153 n 12 1952 p 76-9)
200-ton pre-built headframe moved into position over shaft
Erection of permanent steel headframe for New Jersey Zinc Co over new Friedensville mine shaft near Bethlehem, Pa was performed by moving and setting old steel structure; last step in positioning of permanent headframe was lowering it over anchor bolts on foundation; this was done with 30 screw type jacks operated in unison. (See also Eng and Min J v 153 n 12 1952 p 76-9)
200-ton pre-built headframe moved into position over shaft
Construction Methods Equipment
1952
Article (Journal)
English
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200-ton pre-built headframe moved into position over shaft
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