What size post to use on a lean-to-shed?

[MarkyMC]

What type of timber and size should I use for an outdoor lean to shed?

[MitchellMc]

Welcome to the Bunnings Workshop community @MarkyMC. It's brilliant to have you join us, and many thanks for your question about constructing a lean-to-shed.

For an exterior structure, it would be best to use H3-treated timber as any water that enters the structure will not cause the treated timber to decay. If the structure is completely sealed from the elements then H2-treated timber could be used.

The size of timber directly corresponds with the weight it's bearing and roof spans. For an average-sized lean-to-shed post, you'd be looking at 88 x 88mm 2.4m Post H3 Treated Pine Laminated LSOP FJ posts. However, there are also 112 and 135mm options if this is a larger shed.

I'm keen to hear more about your project, so you might like to show us a sketch of the plan for your shed. Let me know if you need assistance uploading an image.

Please let me know if you have any questions.

Mitchell