Structural timber posts

Fine Cheers

Quick question of a Sunday with usual suppliers closed. Looking for 4" or 6" treated structural timber posts to support a lean to roof. Can you get such posts with say C16 or C24 grade ? Decking posts or fencing posts do not seem to carry such gradings. Need 3m lengths and these will be exposed to elements. TIA.

Calahonda52

The timber won't know its vertical, so you might need to double them up as they wont be easily braced

Stihl waters

Get treated 3x3 or 4x4 posts

Fine Cheers

Thanks. I have fencing posts from another project and have cracked quiet a bit so that has me worried.
Are you suggesting putting 2 no C16 4 x 2's screwed to each other and use as a post ?

Calahonda52

DIY KING wrote: »

Thanks. I have fencing posts from another project and have cracked quiet a bit so that has me worried.
Are you suggesting putting 2 no C16 4 x 2's screwed to each other and use as a post ?

I will draw you a sketch, cant find an image on line

Stihl waters

What is the make up of the roof and what sort of weight will be on it

Fine Cheers

Lean to spans between house and boundary wall = 3.6m. A portion of the lean-to runs past the house for 3m approx so the ledger board on the high side runs out and will be supported on 2 posts, one at corner and one mid way. Roof is simple enough epdm on t&g boards on 175 x 50 @ 600 ctrs. So posts will be supporting a roof area of 3.6 x 3m.

Stihl waters

I think you're overthinking it, a 4x4 post done right will support a lot of weight even though it will be distributed evenly there won't be any great pressure on the 2 posts

Fine Cheers

Indeed, maybe I am. It's just when you see the timber posts crack or split in exposed conditions I'm sure it impacts on the structural performance.

Lumen

DIY KING wrote: »

Indeed, maybe I am. It's just when you see the timber posts crack or split in exposed conditions I'm sure it impacts on the structural performance.

It does not.

fred funk }{

DIY KING wrote: »

Indeed, maybe I am. It's just when you see the timber posts crack or split in exposed conditions I'm sure it impacts on the structural performance.

No. Has very little impact on strength as the splits run with the grain. In fact, its perfectly normal for posts to split.

Fine Cheers

OK thanks for putting me at ease, much appreciated.