Ledger board bolt spacing for lean to roof.

xdrive · 27 Dec 2020

What is spacing for ledger board that spans 4.3m long and is beating on internal leaf block work?

The board is 7x2 the rafters will sit on top off the ledger board.

I was thinking 750mm centres staggered but starting at 200mm from bearing.

I'm using 140mm m12 through bolts.
Thanks

xdrive · 28 Dec 2020

Anyone?

23vc · 28 Dec 2020

That’ll work. You can always add more later if you want. I just used screws to pin it up and build the roof and added the through bolts later on before the BCO came out

catlad · 28 Dec 2020

140 is a bit long it will end up in the cavity probably.

xdrive · 28 Dec 2020

catlad said:
140 is a bit long it will end up in the cavity probably.

47mm board + 75mm wall = 122mm

18mm protruding for washer and nut.

Even if it were to go a little in cavity I've read there's no issues.

Cheers

xdrive · 28 Dec 2020

What Is maximum spacing for bolts?

^woody^ · 28 Dec 2020

M10 @600c/c, staggered 1/3 depth but to miss any bed joint.

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Ledger board bolt spacing for lean to roof.

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