unusualfabrication
+1y
When I built it I laid out all the outside rails, shimmed them all flat and level, measured to make sure it was square, and tacked them all together. Then I laid in all the center rails making sure they were all square and flush to the "top side" of the table and tacked them in. When I welded it I just made sure not to heat it up to much in one area. It turned out great, very flat and square!