Roof truss sling

Details Roof truss sling Roof truss sling

E - Fixed Constructions

21

D

61/66

E21D 15/00 (2006.01) E21D 11/00 (2006.01)

Patent

CA 1249730

ABSTRACT A roof truss sling having an open ended sleeve which has a wire strand passed through it and attached to bolts fixed in the mine roof. The sleeve is distorted so as to simultaneously crimp the sleeve to the wire strand and also shorten its length. The shortening of the length of the sleeve applies a tensile force between the roof bolts through the wire strand. This tensile force serves to compress the mine roof material and thus acts to truss the mine roof. - 1 -

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