Because of the fact that the lumber used to make the forms for the trough is not perfectly straight you don't want to use the sides of the trough to measure from when deciding where you are going to attach the walls to the concrete.

Raising my Steelmaster building by myself, part 1 - wooden support, pulley system, and wench install -    • Raising my Steelmaster building by my...  

Raising my Steelmaster building by myself, part 2 - raising the 1st panel. -    • Raising my Steelmaster building by my...  

Raising my Steelmaster building by myself, part 3 - Update and the first 4 panels. -    • Raising my Steelmaster building by my...  

Raising my Steelmaster building by myself, part 5 - Last panel and final thoughts and details. -    • Raising my Steelmaster building by my...