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  • National Bureau of Standards
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    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']
    Test 257; Test 260; Test 261; Test 266; TR10218-19; FP2982
    December 12, 1950
    23 p.