Posted by John S-B on August 08, 2019 at 17:35:49 from (75.188.61.237):
In Reply to: Cribbing posted by Doug-Iowa on August 06, 2019 at 18:05:22:
A 4x4 should be good for about 6,000 lbs, so in a 2 by 2 box, total weight that you can support is 24,000 lbs. A 6x6 gets you up to 15,000 lbs, or 60,000 lbs for a box crib. If you use a a 3 by 3 box crib, increase the capacity by 50%. It's best to have an overlap on the corners of a couple of inches, that allow a little "crush" to lock in the cribbing like Lincoln Logs. This is using treated pine, Hardwood like Oak is a bit more.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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