Fire-resistant electrical wiring distributing floor structure an

Details Fire-resistant electrical wiring distributing floor structure an Fire-resistant electrical wiring distributing floor structure an

1978-04-28

1980-11-11

Leppink, James A.

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

52 1, 52232, E04C 310

Patent

active

042324939

ABSTRACT:
A floor structure comprising a metal subfloor including metal cellular units providing plural enclosed cells; housings associated with certain of the cells, each adapted to provide future access to different electrical services at one location in the floor structure; a covering layer of monolithic concrete covering the subfloor and the housing, and a layer of fireproofing material covering the lower face of the metal subfloor. Activating means is provided establishing access to the enclosed cells through the housing without significantly reducing the desired fire endurance of the floor structure and without increasing the thickness of the layer of fireproofing material. The fireproofing material has a thickness which is less than that required to provide the floor structure with a desired fire endurance when the housing is activated. A method is disclosed for establishing acess to the enclosed cells through the insert while maintaining the fire endurance capability of the floor structure.

REFERENCES:
patent: 1746625 (1930-02-01), White
patent: 2016382 (1935-10-01), McBurney
patent: 2142165 (1939-01-01), Young
patent: 2167208 (1939-07-01), Hilpert
patent: 2909915 (1959-10-01), Kennedy
patent: 3855741 (1974-12-01), Seman
patent: 3932696 (1976-01-01), Fork
patent: 3973366 (1976-08-01), Blane
patent: 3995102 (1976-11-01), Kohaut
patent: 4061344 (1977-12-01), Bradley

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