How do you square concrete form work?

Answer:
Pick a corner, measure 3 feet on one leg, measure 4 feet on the other leg and it should be 5 feet on the diagonal. That means the form is square. Works for a square or rectangle or for an L or complicated layouts.

For a square or rectangle you can measure corner to corner and the measurements should be the same.
First answer by Lazuruslong. Last edit by Lazuruslong. Contributor trust: 844 [recommend contributor recommended]. Question popularity: 5 [recommend question].