BS 476-21: 1987承重材料耐火性测试
BS 476-21: Fire test on building materials and structures-Part 21: Method for Determination of the fire resistance of load bearing elements of construction.
建筑材料和构件的防火测试-第21部分: 承重材料耐火性测试
This part, together with BS 476: Parts 20, 22, 23 and supersedes BS 476: Part 8:1972, which is withdrawn. However, the latter will still be made available on request, since it is referred to in the building regulations and other legislative documents.
BS 476-21: 1987主要用于如下方面:
Determination of the fire resistance of beams 横梁的耐火测试
Determination of the fire resistance of columns 圆柱的耐火测试
Determination of the fire resistance of floors and flat roofs 地面材料及天花板的耐火测试
Determination of the fire resistance of walls 墙体的耐火测试
样品暴露下高温高压条件下，测试样品在规定时间内的承重量，完整性、隔热性。
BS 476-21: 1987可申请耐火测试时间:
30分钟
60分钟
90分钟
120分钟
150分钟
180分钟
