Cribbing

Question 1

Southern Yellow Pine Grain ratings

Answer 1

Cross Grain - 500 PSI
End Grain - 700 PSI

Question 2

Weight Rating equation

Answer 2

Surface area per contact point x load capacity = weight bearing per contact

Question 3

Wedge Pitch

Answer 3

4:1 Pitch

Question 4

Force required to move an object up inclined plane

Answer 4

(Height/Length)(Weight)

Question 5

Wedge can produce how much lift due to mechanical advantage

Answer 5

500-700 lb