Depends on a few things. Is the [pressure on the 4 inc or the 8 inch sides of it. If on the 8 inch side it is more then twice that of the 4 inch. It is also said that in a fire a wood beam like that is stronger then a metal beam that can hold the same weight since the metal one will start to bend before the wood one will give due to burning.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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