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Old 07-09-2011, 11:08 PM
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SixPointEight SixPointEight is offline
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Quote:
Originally Posted by chainsaw View Post
For that reason, I'm uncomfortable relying purely on the hold-down bolts in the bottom of the safe. If you look at the lever arm (safe is 72" tall, 27" deep, weighs 1300 lbs, the bolts are spaced about 20 inches, there are only 3 hold-down bolts in the bottom, and a 0.65g earthquake is directed so all the load ends up on a single bolt), then the total force on the one unlucky anchor bolt can be as high as 1500 lbs. While a 1/2" redhead anchor in a 2500# slab should theoretically handle that, there is darn little safety margin. With 1/2" lag bolts into floor joists, there is no way to hold the safe down in an earthquake. That's why I also secure the safe at the top; the lever arm there is much better (72" of lever arm rather than 20"), so a small number of concrete anchors or lag bolts can be very effective.
This guy knows his ****. Tagging this thread for more info
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