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1) Are the boards straight after being cured?
If the lumber is not straight, obviously you do not want to use it in areas where you desire a straight wall, floor, ceiling, etc.
2) Is the lumber at the proper moisture content to begin construction?
If the moisture content is too high it will shrink and warp as it dries causing various problems.
The optimum moisture content for the lumber will vary somewhat depending on your geographical location but in the neighborhood of 15% should be close.
3) Another thing to consider is that the lumber will not have been graded showing its structural capacity. The grading process takes many things into consideration including; the moisture content, number and size of knots, species of wood, etc.