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Do update with photos/details when you figure it out, I'm looking at a similar design for my shed (still very much on paper at the moment) albeit with a timber frame not steel. Any reason why you're not running the long length vertical with the noggins horizontal?
Also anyone know of a decent & free roof joist span/thickness calculator?
Polygon-
Reason for long lengths horizontal is that I am using 4m lengths of box profile for the walls which run vertical, so to get fixings at a consistent position I need to run horizontally. I have decided on 600mm centres, will be plenty strong enough, will throw in plenty of noggins and can even throw in some diagonal braces if needed.
Don’t think it is going anywhere, each leg is over a metre into the ground and surrounded by a cubic metre of concrete, small child to give scale...
Sam_w
Hmmm yes, wasn’t sure if i could get away with less seeing as the timber is not providing any structural strength, it’s purely there to hang the tin off.