6.4 Timber and concrete upper floors

6.4.11 Joists supported by intermediate walls

Joists shall be properly fixed at intermediate load-bearing walls.

Solid timber joists

Solid timber joists bearing onto intermediate load-bearing walls should:

  • be nailed together where they overlap
  • not project more than 100mm.

I-joists

I-joists bearing onto intermediate load-bearing walls should have:

  • blocking used to brace the butt joint
  • short sections of joist used to provide lateral support.

Metal web joists

Metal web joists bearing onto intermediate load-bearing walls should:

  • have a minimum 90mm bearing
  • be overlapped.

Last updated: 2nd January 2024

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