鉱物繊維吸音板による天井-小梁-床版2時間耐火構造について

概要

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This report describes the construction and fire endurance test of floor and ceiling assemblies which achived a 2-hr fire resistance. There are many examples of fire resistance construction of Floor and Beam Protection in Japan, but greater parts of them are belong to contacting fire protection system. The method described in this report are belong to the membrance fire protection system, which consisting of steel unit reinforced concrete supported by beam protected with a nominal 15 mm thick mineral fiber acousticaltile ceiling. The object of this investigation was to establish the fire-resistance classification of the same floor and ceiling assemblies utilizing the 303 by 606 by 15 mm thick acoustical ceiling tile (Concealed Metal Suspension System) and 606 by 1, 212 by 15 mm thick acoustical lay-in tile (Exposed Metal Suspension System) by mean of the fire resistance test in accordance with the JIS A 1304 (Method of Fire Resistance Test for Structural Part of Building.) These method were authorised with 2-hr fire resistance construction F-2013 and F-2015 by the Ministry of Construction.
1969-04-30