- Author
- Building Research Association of New Zealand
- Title
- Test and Evaluation Method of Systems to Provide 60 Minutes Fire Resistance foa Nailed Gusset Connections. BRANZ Technical Recommendation.
- Coporate
- Building Research Association of New Zealand, Judgeford
- Report
- BRANZ No. 7, September 1990, 4 p.
- Keywords
- fire resistance rating | fire resistance tests | evaluation | construction | test methods | specifications | timber
- Abstract
- Timber portal frames supporting fire rated external walls are frequently required to have a Fire Resistance Rating (PFF) of 60 minutes, the FRR being defined in NZS 1990 Chapter 5 (1988). The fire resistance of individual members of such structures can be assessed by using the residual section of these members, based on the 'sacrificial method of char' outlined in MP9:1989. To ensure the structural integrity of the portal frames, nailed connections between members are also required to achieve the same FRR. This Technical Recommendation outlines a comparative test and evaluation method using small-scale unloaded specimens, to demonstrate that a particular protective system can be used over nailed gusset connections to achieve a 60 minutes FRR.