Commercial Shearing, Inc.

Nicholas Chlumecky

A crib member for forming underground cribbing is provided in the form of a concrete circle containing fibre reenforcing and preferably in the form of a donut shaped member. A plurality of such members is stacked one on top of another to form a cylindrical cribbing.

Cribbing

A crib member for forming underground cribbing is provided in the form of a concrete annulus formed within at least one annular metal retaining member so as to form a donut shaped member. A plurality of such members is stacked one on top of another to form a cylindrical cribbing with a central hole.

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Youngstown, OH, United States of America

Nicholas Chlumecky