Jennmar Corporation

Dominic Cricelli

John C Stankus

Frank Calandra, Jr

Eugene H Stewart

An elongated channel beam for supporting the surface of an underground rock formation includes a base portion with a bearing surface for contacting the rock strata and an opposite surface having a longitudinally extending central rib and flanged edges for resisting deflection and bending of the channel beam under the load of the rock strata. A plurality of openings spaced a preselected distance apart extend through the central rib. A bearing plate is positioned in overlying abutting relation with each opening in the channel beam. The bearing plate includes embossed areas and longitudinally flanged edges that overlie in abutting relation the central rib and flanged edges of the channel beam. The bearing plate is restrained from longitudinal and lateral movement on the channel beam. Anchor bolts extend through the aligned openings in the bearing plate and channel beam into bore holes drilled in the rock formation. Tightening the anchor bolt compresses the bearing plate against the channel beam with the compressive forces distributed over the surface of the bearing plate and transmitted throughout the channel member to support the rock formation.

Growing community of inventors

Flora, IL, United States of America

Dominic Cricelli