GB/T 9978 "Fire-resistance Tests — Elements of Building Construction" estimates divided into the following parts:
— Part 1: General requirements;
— Part 2: Calibration of fire-resistance test furnace;
— Part 3: Commentary on test method and test data application;
— Part 4: Specific requirements for load bearing vertical separating elements;
— Part 5: Specific requirements for loadbearing horizontal separating elements;
— Part 6: Specific requirements for beams;
— Part 7: Specific requirements for columns;
— Part 8: Specific requirements for non-load bearing vertical separating elements;
— Part 9: Specific requirements for non-load bearing ceiling elements;
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This part is Part 6 of GB/T 9978.
1 Scope
This part of GB/T 9978 specifies the procedures to be followed for determining the fire resistance of beams, when tested on their own.
Beams are normally tested with their underside and two vertical sides fully exposed to heating. However, when the exposure is from four sides or less than three sides, appropriate exposure conditions are necessary. Beams which are part of a floor construction are tested with the floor construction as described in GB/T 9978.5 and are subject to evaluation of integrity and insulation.
The application of this test to other untested forms of construction is acceptable when the construction complies with the direct field of application as given in this part of GB/T 9978.
General guidance on this test method is given in Appendix A.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 9978. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 5907 Fundamental terminology of fire protection — Part 1
GB/T 9978.1 Fire-resistance tests — Elements of building construction — Part 1: General requirements (GB/T 9978.1-2008, ISO 834-1:1999, MOD)
GB/T 9978.5 Fire-resistance tests — Elements of building construction — Part 5: Specific requirements for loadbearing horizontal separating elements (GB/T 9978.5-2008, ISO 834-5:2000, MOD)
3 Terms and Definitions
For the purposes of this part of GB/T 9978, the terms and definitions given in GB/T 5907, GB/T 9978.1 and GB/T 9978.5 and the following apply.
