Forklift movable cribbing column

Details Forklift movable cribbing column Forklift movable cribbing column

2006-08-29

2006-08-29

Lagman, Frederick L. (Department: 3673)

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

C405S272000, C405S273000, C299S011000

Reexamination Certificate

active

07097389

ABSTRACT:
A prefabricated cribbing column for supporting a mine roof. The column includes a plurality of concrete cribbing elements the majority of which are interleaved with load transfer disks. Two of the cribbing elements are interleaved with a handle element. The column assembly of cribbing elements, load transfer disks, and handle element are secured together in an integral unit by a steel strap. The handle element extends substantially beyond the outer periphery of the cribbing elements enabling access and lifting by a forklift or similar machinery. The handle element enables the integral column to be easily moved from one location to another. The cribbing elements are preferably constructed of steel fiber reinforced concrete. A column consisting of five cribbing elements has shown to be capable of supporting a load of 575 tons with a deflection of 2.5 inches or less.

REFERENCES:
patent: 4195111 (1980-03-01), Rautenbach
patent: 4565469 (1986-01-01), Chlumecky
patent: 5143484 (1992-09-01), Deul
patent: 5342150 (1994-08-01), Kitchen
patent: 5439325 (1995-08-01), Kitchen
patent: 6729806 (2004-05-01), Knight

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