High strength, light weight shoring panel and method of preparin

Details High strength, light weight shoring panel and method of preparin High strength, light weight shoring panel and method of preparin

1992-03-05

1994-04-26

Friedman, Carl D.

Static structures (e.g., buildings)

With synthetic resinous component

Foam

52806, 5230912, 52781, 428116, 428 73, F04C 100, B32B 300

Patent

active

053055683

ABSTRACT:
A light weight structural composite panel adapted for use in a vertical orientation in an underground worker protection system is disclosed. The panel comprises first and second fiberglass reinforced resin matrix facing layers and a balsa-containing core means, weights less than about 5.5 to about 6 lbs. per square foot, and when supported in a vertical plane adjacent an excavation wall, is able to withstand an extended load in Type C solid (OSHA, CFR 1926) of at least 592 pounds per square foot with a minimum safety factor of 3:1. Methods of preparing the panels and methods of assembling the panels into excavation support systems are also disclosed.

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patent: 4801483 (1989-01-01), Beckerman et al.
patent: 4956217 (1990-09-01), Heitkamp

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