Fire Endurance Test of a Roof/Ceiling Construction of Paper Honeycomb and Gypsum Board.

摘要

In a program of evaluation of various housing systems proposed under Operation BREAKTHROUGH a fire endurance test was performed on a roof/ceiling assembly consisting of a paper honeycomb structural core surfaced both sides with glass-fabric impregnated with polyester resin and outer layers of gypsum board. The applied load was 15.9 psf and the test results are valid only for roof/ceilings of similar construction loaded at or below the stress level developed by this loading. Under a loading of 15.9 psf on a 13ft. 5in. span,which produced a stress equivalent to the application of 20 psf on a 12ft. span,failure by flame-through of the roof/ceiling assembly was noted. (Modified author abstract)