Fire-resistant floor structure

Details Fire-resistant floor structure Fire-resistant floor structure

1980-03-19

1982-04-13

Murtagh, John E.

Static structures (e.g., buildings)

Tensioned or flexed sheet facing

174 48, 169 48, H02G 308, E04F 1708

Patent

active

043240780

ABSTRACT:
Apparatus for fireproofing an underfloor access chamber of an electrical wiring distributing floor structure. The access chamber is formed between a cellular unit and a covering layer of concrete. The access chamber has at least one inlet opening communicating with a raceway presented by the cellular unit; and an outlet opening providing access to the chamber from the space above the concrete. An unobtrusive strip of fire-resistant material, disposed within the chamber, covers substantially entirely all of the bottom portion and obstructs the inlet opening. The strip shields the upper portion of the chamber from heat transfer by convection and by radiation. Slit means formed in the strip allows passage of wiring without significantly deteriorating obstruction of the inlet opening.

REFERENCES:
patent: 3420018 (1969-07-01), Fork
patent: 3864883 (1975-02-01), McMarlin
patent: 3932696 (1976-01-01), Fork et al.
patent: 3973366 (1976-08-01), Barane
patent: 4061344 (1977-12-01), Bradley
patent: 4179319 (1979-12-01), Lofdahl
patent: 4223175 (1980-09-01), Crew
patent: 4232493 (1980-11-01), Gray et al.
patent: 4249353 (1981-02-01), Berry
patent: 4289921 (1981-09-01), Gartner et al.

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