Tack welding, corners or straights?

[MarkB]

Originally Posted by mr henderson

When tack welding the chassis, do you prefer to tack on the corners, or in the middle of the straights, or somewhere else?

I used to tack in the straight parts, but I'm thinking maybe the corners would be better, make for a smoother looking weld (as I'm inclined not to gring the tacks down before fully welding)?

Always tack the corners as it lets you alter things with a tap of a timmy mallet if it's gone out of square. Measure corner to corner then when correct tack on the inside to stop it moving.