Quote Originally Posted by examorph View Post
Been a nightmare finding a local supplier that does box section without a 7.5mtr minimum order charge, but got one eventually who can do me some off cuts at a 3mm wall for a good deal.

Will the 3mm wall thickness box section be OK for the bed support beams and horizontal supports shown below in green? Will it also be OK to weld?
Attachment 17786
The main problem apart from resonance with 3mm box is that it is not quite thick enough to tap 4mm or 5mm would be a better option. If it is just for the green bits then it is probably OK