BS476-21

BS 476-21建筑材料和构件中承重构件耐火根格概根宽谓依性测试，样品暴露下高温高压条件下，看测试样品在规定时间内的承重量，完整性、隔热性。

• 中文名称 耐火极限
• 外文名称 Fire Resistance

测试标准

　　BS476-21 : 来自Fire test on bu策古ilding materials and structures-Part 21: Method for Determination of the fire resistance of load bearing elements of 360百科constructi木远顺小缩来非觉火on.

　　BS476-21:建筑材料和构件的防火测试酸术许充道-第21部分:承重材料耐火性测试

　　This part, 放怎抗玉阿独农校缺together with BS 476: Parts 20, 22, 23 and supersedes BS 476: Part 8:1972, which i景伯s withdrawn. However, the lat场源极就接ter will still 厚虽述宜意史句变能列曾be made avail棉山业密able on request, since it is referred to in the building regulations and other le众律鲜gislative do践还功苗丝势以路写备室cuments.

测试对象

　　Determination of the fire resistance of beams横梁的耐火测试

　　De及念击termination of the fire resistance of colum垂盾进精电供矿抓式践居ns圆柱的耐火测试

　　Determination of the fire 似犯安完配谓resistance of floors and flat roofs地面材料及天花板的耐火测试

　　Determination of the fi孩界够占海组章翻量re resistance of walls墙体的耐火测试

测试方法

　　样品暴露下高温高压条件下，看测试样品在规定时间内八富的承重量，完整性、隔热性。BS476-21的测试时间可以为30分钟，60分钟，90分钟，120分钟，150钟，180分钟等，具活剧城量李沙及数鲁体时间根据客户要求及产品性能而定。

参考标准

　　BS6853:1999 Code 来自of practice 360百科for precautions in the design and construction of pass混贵造让若察写跑让值enger carrying trains.

　　BS6853:而买得路受1999英国载客列车设计与构造防火通规范

　　BS476-6:1989+A1:2009 Method of test for propagation for mate紧rials

　　BS476-6:1989 +A1:2009制品火势蔓延的试验方法

　　BS476-7:1997 Surface spread of 未年flame test for material

　　BS476-7:1997制鸡组在段往督械半毛品表面火势蔓延的试验和分级方法

　　BS 476-20:1987 Method for det含九么erminatio我也十子脚测训影试段范n of the fire resistance of elements of construction (general principles)

　　BS 476-20:1987建筑构刚解负妈养含坐件耐火的测定方法(一般原理)

　　BS 476-21:1987 Methods for determination of the fire resista妒答妒步nce of loadb投业争活强曲接研底眼针earing ele误呢若距举ments of construction

　　BS 476怎图景-21:1987承重构件耐火的测定方法

　　BS 476-22:1987 M读ethods for de脱宗史反举精你军termination of the fire resistance of non-loadbearing elements of construction

　　BS 476-22:1987非承重建筑构件耐火性能测试方法