A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Roof support for heavy ground which permits rock to relax into natural pressure arch; arch segments are made of "U" shaped section weighing 15 lb per ft; overlapping sections are fastened together with two 1-in. "U" bolts and heavy clamp bars and resistance to yielding can be regulated to suit conditions; each yielding joint consists of 15 in. of overlapped section.
Roof support for heavy ground which permits rock to relax into natural pressure arch; arch segments are made of "U" shaped section weighing 15 lb per ft; overlapping sections are fastened together with two 1-in. "U" bolts and heavy clamp bars and resistance to yielding can be regulated to suit conditions; each yielding joint consists of 15 in. of overlapped section.
Yieldable steel arches for roof support
Min Congress J
Sleeman, R.W. (author)
1955
4 pages
Article (Journal)
English
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