If cribbing is used for lifting, how many times larger must it be than the jack pad?

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Multiple Choice

If cribbing is used for lifting, how many times larger must it be than the jack pad?

Explanation:
Stability and load distribution are what this item tests. When cribbing is used to lift, the cribbing must create a stable, wider base than the jack pad alone. Making the cribbing about three times larger than the jack pad provides enough contact area to spread the load, resist tipping, and keep the contact surfaces from deforming under pressure. If the cribbing is only about twice as large, there isn’t enough base to prevent settling or slipping under load. Making it four or five times larger adds extra material and effort without providing proportional safety benefits for typical lifts. So, three times larger is the effective balance for stability.

Stability and load distribution are what this item tests. When cribbing is used to lift, the cribbing must create a stable, wider base than the jack pad alone. Making the cribbing about three times larger than the jack pad provides enough contact area to spread the load, resist tipping, and keep the contact surfaces from deforming under pressure. If the cribbing is only about twice as large, there isn’t enough base to prevent settling or slipping under load. Making it four or five times larger adds extra material and effort without providing proportional safety benefits for typical lifts. So, three times larger is the effective balance for stability.

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