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Old 02-04-2009, 12:50 PM
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Question Earthquake Proof?

I wonder.... Can anyone make a log home, if not earthquake proof, at least REALLY earthquake resistant? Say to an 8.5 or 9.0? Seems like that would be an incredible marketing idea to the Chinese and really....all of Asia or the Ring of Fire. Thoughts?
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Old 02-04-2009, 07:17 PM
Alberta Loggie Alberta Loggie is offline
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Don't remember where I'd seen it, but I have read reports of log homes withstanding hurricanes (sometimes minus the roof) as well as earthquakes. I would think that a properly constructed, through-bolted log home should be able to withstand much larger forces than any stickbuilt and come through a bit "rattled" but otherwise together.

Here's a link to an article on the storm resistance of log homes. Most of it refers to hurricanes, but there is one mention of an earthquake as well.

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Old 02-06-2009, 11:37 AM
teedlebeans teedlebeans is offline
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Somewhere I saw some work at (I think) Texas tech, wherein a student evaluated the shear strength of log walls for his Masters thesis in civil engineering. He looked at lag bolt construction walls, with countersunk bores and washers that held the lag bolts. I believe he found that the log walls were pretty strong, though I don't remember the particulars. I even thing that someone on LHOTI pointed it out -- maybe Dr.

The point of the work was to establish how much better (or not) log walls were when it comes to shear failure, which is the major failure mode in earthquakes. Again, I think he found that log walls were pretty good, though not the equivalent of a sold slab of wood.

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