Quote Originally Posted by Vic66 View Post
... the problem with box section is bolting the steel angle to it, you cant get to the nuts to tighten them up...
Think back to those old cars with box section chassis, how did they get round the problem? SImply drill/bore out a hole in the box opposite the nut so a long socket or socket+extension can be passed through the hole withthe nut held in the socket with a dab of grease.. If the rear of the box isnt accessible then cut a slot in the wall of the box sufficient to get a spanner and nut through. Third option is to create captive nuts by drilling/tapping out a piece of steel that is a sliding fit in the box section (only really works for narrow section). A fourth option, if the wall of the box section is thick enough, is to tap it directly. And a fifth option is to cut a rectanglular slot where the hole should be, slide in a tapped piece slightly narrower but longer than the hole and weld in place.