Exterior timber slat most span – Buzz Credit score

Exterior timber slat most span

Query
I’d prefer to assemble an exterior timber display out of 70x30mm Blackbutt to adjust to BAL 29 hearth score. What’s the most span of the timber and what are the utmost spacing between fixings?

yaotian1993@gm…
Wed, 04/02/2025 – 12:06

Reply

If the blackbutt display is required by rules to stop embers from accumulating underneath the ground, the display must be a lapped cladding profile with sub-floor air flow openings protected with mesh. Fixings can be to swimsuit the cladding profile. Alternatively, 70 x 30mm timbers may very well be spaced aside with mesh defending the gaps. The mesh should be corrosion-resistant and have a most aperture of 2mm. These necessities solely apply if the home ground is lower than 400mm above completed floor degree. If the display shouldn’t be required to stop embers, ie. the ground is greater than 400mm above floor, or protected differently, a measurement of 70 x 30mm in kiln-dried blackbutt ought to safely span as much as 2.1m. For finest outcomes use 4.2m lengths over 3 helps. 

 

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