Quote:
Originally Posted by Lester
Hi Peter, be careful welding on the same side of steel to fix the rollers to the roof as it will contract at the weld and bend the steel. I had the same issue when building my observatory and had to do equal welds on the other side of the RHS to get it straight again.
All the best.
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Yes. Welding that flat bar on the bottom section was like that - had to alternate sides all the way - and still there was room for a little "persuasion" with a mallet.
Peter