A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Yieldable steel arch and yieldable steel ring supports in metal mines
Results of investigation on use of yieldable steel arches and steel ring sets in several mines; sets, are made from hot-rolled, cold bent, structural U-shaped steel section in 2 weights, 15 lb and 21 lb/ft; former 6 ft length of this structural shape installed as supporting column will safely carry same load as Douglas fir post of same length but of 22 times cross-sectional area of steel.
Yieldable steel arch and yieldable steel ring supports in metal mines
Results of investigation on use of yieldable steel arches and steel ring sets in several mines; sets, are made from hot-rolled, cold bent, structural U-shaped steel section in 2 weights, 15 lb and 21 lb/ft; former 6 ft length of this structural shape installed as supporting column will safely carry same load as Douglas fir post of same length but of 22 times cross-sectional area of steel.
Yieldable steel arch and yieldable steel ring supports in metal mines
U S Bur Mines -- Information Cir
Eilertsen, N.A. (author)
1962
55 pages
Report
English
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