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The vertical load capacity of a "plain" wooden post will depend on its height. You can load a 6" x 6" post that is up to about 10 feet tall that is sitting under a spreader beam and on a sill to something like 15,000 pounds. But this is exclusive of any torsional or deflecting loads, and you know why. A beam loaded to capacity in the vertical that is then subject to any significant lateral or torsional loads will almost certainly fail. Structural engineers earn their living making calculations like this in various situations. And they are worth every penny.

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Wiki User

15y ago
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frank hedger

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1y ago

15000

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Anonymous

Lvl 1
4y ago

If u had three post. Two 10ft apart with the third on top of the other two. Can it hold up 4tons.

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