Hares shed alteration.

[simmy_bull]

I'd like to remove a couple of door posts from a wooden framed shed I've got. Doors are 8 foot and the middle opening is 5 foot 1 which would leave a span of a little over 21 foot is this too far to have in supported? The beam that crosses from post to post is an 8 x 3 and it is joined in the middle and overlaid with plywood and nailed up. I'm fairly sure it would be OK as the rest of the shed is clear span and the other rafters look a lot flimsier than the gable rafter as they are made up of 4 x3in timbers or similar and again joined with bits of ply. There is a rafter every half bay also so this gable rafter would only be supporting half a bay effectively. Anybody any thoughts? Thank You

 

[Forever Fendt]

belt and braces , get a piece of 6 or 8x3 channel and drill some 14mm holes every 600mm and bolt or coach screw it to the bottom cord

 

[simmy_bull]

belt and braces , get a piece of 6 or 8x3 channel and drill some 14mm holes every 600mm and bolt or coach screw it to the bottom cord

Do you mean to wrap the channel around the timber so to speak? Or put it underneath?

 

[Forever Fendt]

Do you mean to wrap the channel around the timber so to speak? Or put it underneath?

put the flat back against the timber,ideal put the holes on the centre line of the timber (negative axis) you could weld a few tabs under the channel and sit them tight against the bottom of the timber

 

[RWG Contracts]

belt and braces , get a piece of 6 or 8x3 channel and drill some 14mm holes every 600mm and bolt or coach screw it to the bottom cord

+1

 

[Blue.]

As Ff posted but a cheaper way is box type crash barrier.

 

[Forever Fendt]

As Ff posted but a cheaper way is box type crash barrier.

its 21 ft i think it would be better one piece are those barriers about 15ft seen them used on a lean to as posts did a good job

 

[Blue.]

its 21 ft i think it would be better one piece are those barriers about 15ft seen them used on a lean to as posts did a good job

They are 16' I weld them together,cheap at £32 each.

I'm also cutting them in half for fence strainers.

 

[Forever Fendt]

They are 16' I weld them together,cheap at £32 each.

I'm also cutting them in half for fence strainers.

never thought of that they would make good strainers and weld gate hinges on them ,know that may tip some of the fencing lads over the edge!

 

[simmy_bull]

Sounds like the TFF collective have come up with a broadly workable solution then I'll price up a piece of channel vs price of some crash barrier and go from there. Presumably I'll have to take that piece of ply off to get the steel to fit flat along the wooden beam?

The only other solution I can think of is to replace the ply with a wider and taller piece of steel plate and bolt it through in several spots. I don't think the timber beam is too weak as such it's only the join I the middle that worries me.

Times like this I wish I understood a bit more about forces and loads within a structure as I did wonder if the horizontal beam was actually even carrying much weight or is it basically tying the station posts together which in turn supports the apex as if the ridge needed to move down (to collapse) the legs would need to move outwards??

Or could be totally wrong

 

[Blue.]

Sounds like the TFF collective have come up with a broadly workable solution then I'll price up a piece of channel vs price of some crash barrier and go from there. Presumably I'll have to take that piece of ply off to get the steel to fit flat along the wooden beam?

The only other solution I can think of is to replace the ply with a wider and taller piece of steel plate and bolt it through in several spots. I don't think the timber beam is too weak as such it's only the join I the middle that worries me.

Times like this I wish I understood a bit more about forces and loads within a structure as I did wonder if the horizontal beam was actually even carrying much weight or is it basically tying the station posts together which in turn supports the apex as if the ridge needed to move down (to collapse) the legs would need to move outwards??

Or could be totally wrong

Ideally you want to replicate the other trusses,you can leave the ply just nail something of the same thickness on before the steel is bolted on.

 

[TripleSix]

K A Andersons at Ripon usually have crash barrier in, and rusty channel...