Fire Endurance Test of an Interdwelling Double Wall Construction of Paper Honeycomb and Gypsum Board. Final Report.
Fire Endurance Test of an Interdwelling Double Wall
Construction of Paper Honeycomb and Gypsum Board. Final
Son, B. C.
NBSIR 73-166; 19 p. April 1973.
Sponsor:Department of Housing and Urban Development, Washington,
Order number: PB-222297
fire endurance; fire tests; glass reinforced polyester
resins; Operation Breakthrough
As a part of the evaluation of a housing system proposed
under Operation BREAKTHROUGH, a fire endurance test was
performed at the National Bureau of Standards on a
double wall assembly intended as an interdwelling
separation for single family attached housing. Each
wall of the assembly contained a core of paper honeycomb
surfaced on both sides with glass fabric impregnated
with polyester resin, and protective layers of gymsum
board. The test method was generally in accordance with
the requirements of ASTM E 119, Fire Tests of Building
Construction and Materials. The applied live load was
636 p1f on each panel and the results of this test are
valid only for walls of similar construction loaded at
or below the stress levels developed by this loading.
The fire endurance of the first (fire-exposed) wall
panel was 65 min:30 sec, based on flame penetration
through cracks and openings formed on the back face of
the first wall. The overall fire resistance of the
double wall assembly was 79 minutes when pieces of the
structural glass fabric of the front face of the second
wall were observed falling into the furnace.