Lean to shed

the quiet fella

Thinking of putting up a small lean to shed. Size 7m * 7m rising to approx 5m at high point.

Want to have it in such a way that I can add a second lean to off it in a few years if and when funds allow to complete the "A" as such

What size steel would I need for uprights and rafters. Would I get away with 2 uprights or would I need 3 per side

Any idea of cost including concrete floor and block wall 5ft high all around

Who2

4.8m would be a standard bay and works with your 6x3 timbers for length. 7m by 7m is an odd size. You’ll get away with using 7 by 4 steel if she’s a low enough shed. But I’d be inclined to use 8x4 and brace it.
Your best bet is get a lad to make it. I can weld and have enough gear to make a shed but it just wouldn’t pay. Buy it as a kit form and stand it yourself if needs must.

the quiet fella

Just getting back to this.

What is the widest I could go using a 9x3 timber rafter and 6 X 3 purlins for a lean to

Looking to go 13ft at the lowest so could store bales 3 high if needed

Who2

the quiet fella wrote: »

Just getting back to this.

What is the widest I could go using a 9x3 timber rafter and 6 X 3 purlins for a lean to

Looking to go 13ft at the lowest so could store bales 3 high if needed

The longest length of 9 by 3 is 6m do you can work back from that but it will be mad dear as it’s off standard and definitely would be too dodgy to chance. Buy it in steel 8 by 4 steel is not a hole pile dearer and 7 by 3 will work out around the same. Do it right for the sake of the few quid.

charolais0153

Whats the widest width an A shape shed can be without a girder in the middle of the shed?

Who2

charolais0153 wrote: »

Whats the widest width an A shape shed can be without a girder in the middle of the shed?

All depends on the pillar and rafter section. I’ve seen sheds done with two foot web on the girder but these would be big industrial units, I never really paid much attention to the span but definitely no center pillars.

the quiet fella

Who2 wrote: »

The longest length of 9 by 3 is 6m do you can work back from that but it will be mad dear as it’s off standard and definitely would be too dodgy to chance. Buy it in steel 8 by 4 steel is not a hole pile dearer and 7 by 3 will work out around the same. Do it right for the sake of the few quid.

Definitely can get 9*3 in longer lengths. Got them 7.2 before but these were resting on a block wall at about 5m and a 2m overhang but not too sure if you would use the full 7.2 without any supports. Only thing is if you could use this length would save getting engineering firm involved and could do most if it myself.

Bass Reeves

the quiet fella wrote: »

Definitely can get 9*3 in longer lengths. Got them 7.2 before but these were resting on a block wall at about 5m and a 2m overhang but not too sure if you would use the full 7.2 without any supports. Only thing is if you could use this length would save getting engineering firm involved and could do most if it myself.

7m is a massive span for timber. I would be afraid it might sag in the longterm. The other factor is wind you would want the shed facing East or North if it is open. Even for steel it is a huge span unless engineered right. When my shed was build one of the sides was about 18' and an intermediate pillar was put in. now it was a grant spec job so even you side are quite long.

Who2

the quiet fella wrote: »

Definitely can get 9*3 in longer lengths. Got them 7.2 before but these were resting on a block wall at about 5m and a 2m overhang but not too sure if you would use the full 7.2 without any supports. Only thing is if you could use this length would save getting engineering firm involved and could do most if it myself.

If you want work away but your wasting your money imo. I’ve never seen 9x3 at 7.2m and I have issues getting 6m lengths at the best of times. You will probably get them off a sawmill but again it’ll cost. Pull out the home bond book theres a whole section on timber strengths and how far you need support. It’ll give you an idea what it should be at.

the quiet fella

Found this in S101 of the department spec

In bay widths up to 4.8 metres, timber rafters, 300mm x 75mm may be used to a maximum
span of 4.6 metres [4.3m under fibre-cement sheets]. This also applies to lean-to structures.

so looks like you would only get a 15ft span with a 12 x 3