Exterior timber slat most span
Query
I might prefer to assemble an exterior timber display out of 70x30mm Blackbutt to adjust to BAL 29 fireplace ranking. 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 forestall embers from accumulating below 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 flooring is lower than 400mm above completed floor degree. If the display is just not required to forestall embers, ie. the ground is greater than 400mm above floor, or protected another way, a measurement of 70 x 30mm in kiln-dried blackbutt ought to safely span as much as 2.1m. For greatest outcomes use 4.2m lengths over 3 helps.
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