National Bureau of Standards
view article (9.9981365)
Fire-Endurance Tests of Bar-Joist Floors With Ceilings of Perlite-Gypsum Plaster on Perforated Gypsum Lath.
National Bureau of Standards, Washington, DC
Test 257; Test 260; Test 261; Test 266; TR10218-19; FP2982,
December 12, 1950,
23 p.