! j I I - National Roofing Contractors Association

Built-up RoofingGeneral information with test description and suggested values as specified in NBS BSS #55/197443-IG 33-IC 43-IC 43-15 33-XG 33-XC 43-X5 33-NG 33-NC 43-N5 31-IG 31-IC 31-15 21-YG 21-YC 31-Y5 31-XG 31-XC 41-X5 31-NG43E-IG 33E-IC 43E-IC 43E-I5 33E-XG 33E-XC 43E-X5 33E-NG 33E-NC 43E-N5 31E-IG 31E-IC 31E-I5 21E-YG 21E-YC 31E-Y5 31E-XG 31E-XC 41E-X5 31E-NG~~~~~~~~~~~~~~~~~~~~x x x xx x x x x x x x x xx x x x x x~~~~~~~~~~~~~~~~~~~~4 4 5 4 3 4 4 3 4 4 3 4 3 2 3 3 3 4 4 3I4 3 4 4 3 3 4 3 3 4 3 3 3 2 2 3 3 3 4 2I I I I I I IX X X X X X X X X X X X X X X X X X X XX X X X X X X X X X X X X X X X X X X XX X X X X X X X X X X X X X X X X X X X4 4 4 4 4 4 43 3 3 3 3 3 3X X X X X XX X xx x xx x x x x x x6.0 5.50 5.50 5.50 5.50 5.50 5.501.50 1.50 1.0 1.50 1.50 1.502.0 2.40 2.0 2.0 2.0 2.0 2.0~~~~~~~~~~~~~~~~~~~~1965 1965 1965 1965 1965 1965 1965 1965 1965 1965 1983 1983 1983 1983 1983 1983 1983 1983 1983 1983337 238 337 337 238 238 337 238 238 337431 321 431 431 321 321 431 321 321 431~~~~~~~~~~ 15.2 12.9 15.2 15.2 12.9 12.9 15.2 12.9 12.9 15.2~~~~~~~~~~ 1.174 1.294 1.174 1.174 1.294 1.294 1.174 1.294 1.294 1.174~~~~~~~~~~~~~~~~~~~~""'.. . -- -, -- 35 .,