NOTE:
1) Limit of fire resistance in structures are determined by fire tests according to the standards TCXDVN 342: 2005 to TCXDVN 348: 2005 () or equivalent standards. Refractory limit of building structures can be determined by calculating the standard design refractory apply.
2) Limitation required fire resistance of structures built specifically set forth in this regulation and in the technical regulations for each type of work. Refractory limit requirements of building structures is denoted by REI, EI, RE or R together with the corresponding index of time is affected by the fire in minutes. For example, limited constructions required fire resistance as REI 120 means that structures must be maintained at the same time all three possibilities: strength, integrity and insulation during the period affected by the fire is 120 minutes ; Limited structures required fire resistance is R 60, the components must only maintain the bearing capacity during 60 minutes, does not require the ability to insulation and integrity.
3) A building structures supposedly to ensure the requirements of the fire resistance if they meet one of two conditions:
a) constructions are formed with the same specification as refractory samples and experimental samples as limited not smaller Refractory Refractory limit requirements of the components that;
b) have structural constructions with technical specifications matching components specified in Annex F and can resist the corresponding nominal fire in this annex is not less than the limit required fire resistance of structures there.
đang được dịch, vui lòng đợi..