Cribbing

Question 1

Cribbing

Answer 1

• Southern Yellow Pine or Douglas Fir
• Maintain 4” overlap on box cribbing
• 4x4 = 6,000 lbs per point of contact
• 6x6 = 15,000 lbs per point of contact

Question 2

Box Cribbing

Answer 2

• Should not routinely exceed 3x the width minus overlap if all 4 points are loaded
• Never stack more that 2 high in the same direction
• Overlap edges by dimension of the cribbing to ensure slow, crushing failure.
• Recommended 3x3 crib tower be used for airbag operations

Question 3

Shims and Wedges

Answer 3

• Place cut side to cut side
• Can produce 500-700 lbs of lift due to MA
• A set of 4x4 wedges can effectively lift 6” without being overdriven.