Dwarf wall concrete slab edge

[RobertPW]

Hi all.

I’m building a lean to on the side of my garage and having laid a concrete slab, plans are evolving.

My slab is 4inch thick with 6mm mesh on a DPM above 4inch on MOT, all surrounded by 2inch thick edging. The lean to is only for bike and garden tool storage.

Question 1…
I’m going to build a dwarf wall, 6 courses high with a timber frame on top and flat roof. How close to the edge of the slab can I build? Can I go to the edge of the concrete?

Question 2…
What’s the best way to secure the sole plate to the dwarf wall? Thunderbolts or L restraining straps?

Question 3…
Sloping joists or firings?

Any thoughts greatly appreciated.

 

[jj4091]

1 Yes, but a narrow soakaway around it would be advisable unless you are going to have gutters and a down spout to a soakaway.
2 Bolts
3 Take your pick https://www.google.com/search?q=slo...gBAZgCAaACdpgDAJIHAzAuMaAH5AE&sclient=gws-wiz