Tis only a bit of light gauge, strip steel & not too difficult to pre-bend over your knee
If you have delicate knees or a super model
Place a couple of blocks of wood on the floor, leaving a decent gap between them & strike with the round end of a hammer to form the rough profile
It might sound obvious but make sure that you gently work from one end to the other & don't just twat it in the middle !!
Best to under-bend it a little & tack it as you pull it around the curve