NFPA 251 Standard Methods of Tests of Fire Resistance of Building Construction and Materials
NFPA 251 建筑结构和材料耐火试验方法标准
1-1.1 These methods of fire tests apply to assemblies of masonry units and to composite assemblies of structural materials for buildings, including bearing and other walls and partitions, columns, girders, beams, slabs, and composite slab and beam assemblies for floors and roofs. They also shall apply to other assemblies and structural units that constitute permanent integral parts of a finished building.
1-1.2* It is the intention of this standard that classifications be based on performance during the period of exposure and shall not be used to determine suitability for use after fire exposure.
1-1.3 The results of these tests are one factor in assessing fire performance of building construction and assemblies. These methods prescribe a standard fire exposure for comparing the performance of building construction assemblies. Application of these test results to predict the performance of actual building construction requires careful evaluation of test conditions
Make sure construction methods and materials pass the test!
NFPA 251 Standard Methods of Tests of Fire Endurance of Building Construction and Materials specifies methods for determining the fire-resistive abilities of building members and assemblies, including tests of
· Bearing and nonbearing walls and partitions
· Columns
· Floor and roof assemblies
· Loaded restrained beams
· Performance of protective membranes in wall, partition, floor, or roof assemblies
Improved for better application and performance!
Technical revisions include the addition of definitions of fire resistance and fire resistance rating, and modifications to the hose stream test requirements. The document also complies with NFPA®'s Manual of Style. (Softbound, 29 pp., 2006)