Method and system for supporting a roof

Details Method and system for supporting a roof Method and system for supporting a roof

1977-11-08

1980-01-29

Stein, Mervin

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

248354R, 405239, E21D 2304

Patent

active

041859405

ABSTRACT:
A plurality of hollow prop casings are provided which are each composed of at least two telescopable sections. These sections are erected by putting them upright and are then telescoped apart until they bear upon the roof to be supported. They are then temporarily arrested in this position and filled with a hardenable substance in flowable condition which, when it hardens, forms a solid column that is able to support the roof. Reinforcing bars or similar elements may be provided in the interior of the prop casings to become embedded in the hardenable substance. Measures may be taken for facilitating disassembly of the prop casings with the solid columns therein, under circumstances in which the casings are subjected to downward pressure by the roof.

REFERENCES:
patent: 2322855 (1943-06-01), Lenahan
patent: 2451777 (1948-10-01), Salas
patent: 2930199 (1960-03-01), Jarund
patent: 2956643 (1960-10-01), Halstead
patent: 3292892 (1966-12-01), Abbott
patent: 3594973 (1971-07-01), Archer
patent: 3690110 (1972-09-01), Wiswell, Jr.
patent: 3861155 (1975-01-01), Steinberg

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