choosing wood for legs and frame

Select pairs of 2x4 planks to form futur frame and legs. Once the planks are chosen, define a unique marking that is going to help you

1. uniquely identify the part
2. uniquely orientate the part.

In addition

1. knots should be outside of futur join area
2. grain should be mismatched
3. allow some room for cutting, waste, tests, etc.