Also see:
6.47.2.10 Strutting for site formed attic trusses and cut roofs that form a floor
Strutting to site formed attic trusses shall be provided to support the applied loads and self-weight without undue movement or distortion.
Strutting should be provided:
- in accordance with the design
- where the span between the node points which form the width of the floor of the attic truss exceeds 2.5m
- where the span between the supports to a floor within a cut roof exceeds 2.5m
- using herringbone (38mm x 38mm timber) or solid strutting (a minimum of 0.75x the depth of the floor and a minimum of 38mm thick).
Table 7: Provision of strutting
| Span of floor | Rows of strutting |
|---|---|
| Under 2.5m | None required |
| 2.5m-4.5m | One (at centre of span) |
| Over 4.5m | Two (at equal spacing) |
Last updated: 2nd January 2024