Tree Work
Center of Gravity Estimator
For a tapered log, the center of gravity is closer to the large end. This calc gives the balance point from each end to help set the sling for a level lift.
Distance from large end (ft)
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- Distance from small end (ft)
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- % of length from large end
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- Taper ratio
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FAQ
Why is the COG not at the middle? +
Because the large end weighs more per linear foot than the small end. A 16-ft log with a 14-in top and 24-in butt balances about 6.6 ft from the butt — not at 8 ft.
How do I use this for crane rigging? +
Set your sling at the calculated balance point and the log will lift level. Off by a foot and it will tip — the heavy end drops first.
Does this account for branches? +
No — straight log only. If you have a top with branches still attached, the COG shifts toward the canopy. When in doubt, lift, set down, and adjust.