I have pretty much the same table except for attaching the leggs. Top is 1 1/8" car decking. 1 1/4" steel pipe legs and pipe flanges to hold on to the leggs, Just screw them in.
The wedges to fit the flanges to are 3/4" hardwood glued and screwed to the underside of the table and wide as the flanges are round. I'd probably have liked the welded leggs but I don't weld so good! Like the finish on that table. Cardecking is alright but a bit ruff!
