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Fire testing of wall assembly based on ASTM E 119 provides four performance criteria that need to be met: Resistance of wall assembly against heat transmission through it. Resistance to the travel of flame or hot gasses through the wall adequate to start fire and burn cotton waste on the other side of the wall which is not exposed to fire.
Fire resistance of building elements is an important consideration in building design. While structural design considerations for concrete and masonry at ambient temperature conditions are addressed by ACI 318 and ACI 530/ ASCE 5/TMS 402, respectively, these codes do not consider the impact of fire on concrete and masonry construction.
The resistance of concrete masonry to fire is well established by extensive testing to be a function of the type of aggregate used in the manufacture of the masonry units and their equivalent thickness.
CALCULATED FIRE RESISTANCE RATINGS Background The calculated fi re resistance method is based on extensive research and testing of concrete masonry walls. Fire testing of wall assemblies is conducted in accordance with the Standard Test Methods for Fire Tests of Building Construction and Materials, ASTM
This standard provides requirements for determining fire resistance of concrete and masonry elements and assem-blies. Calculation procedures for determining fire resistance are provided for concrete walls, floors, roofs, and columns and masonry walls, lintels, and columns. Procedures are also included for determining requirements for concrete
All Thomas Armstrong lightweight, dense and Airtec Aerated blocks and achieve the very best possible resistance to fire rating of "Class A1" (BS EN 13501-1:2002). This European Standard supersedes and exceeds the former British Standard BS 6073 "Class 0" spread of flame rating.
A four-hour fire rating may be achieved by using a U.L .C. rated lightweight block, or by filling a 190 mm wide block with concrete grout (see BC BC Section D-2 )
