Subject	The ramps you are showing are spanning with the
Posted by	not4resaleZ on March 02, 2009 at 10:11 AM
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In Reply To	At that length and support, there is very posted by Keaner on March 01, 2009 at 10:47 PM
Message	wood fibers, the case we are talking about is spanning perpendicular to the fibers. Wood should not be loaded to create tension across the grain. I'm not saying that it will split, I'm just saying that it's not intended to be loaded this way. The 500-700psi is cross grain compression, so there is very little possibility of crushing the wood under the wheel or at the 2x4 support.
Follow Ups	Extreme Ni[X]it blocks and 6 ton jack stands = over kill? - ZEVAN (Ca) 19:18:03 03/01/09 Re: Extreme Ni[X]it blocks and 6 ton jack stands = over kill? - nissansx 19:59:39 03/01/09 www.homedepot.com - BigTDogg (MA) 20:01:34 03/01/09 (8) 2"x4"x8' (2) 2"x12"x8' - ZEVAN (Ca) 20:08:43 03/01/09 appreciate it. thanks. (n/m) - nissansx 20:18:23 03/01/09 I just used four jackstands, my car was held up fine (n/m) - sammystubag 20:16:15 03/01/09 been workin' for me... (n/m) - MAD_96TT(MO) 22:27:41 03/01/09 Don't really care for the cross grain bending in the top - not4resaleZ 20:35:39 03/01/09 2nd. (n/m) - nemo1080 (Iowa) 21:28:14 03/01/09 So make the top two 2x12s - BobbyT 22:29:52 03/01/09 At that length and support, there is very - Keaner 22:47:28 03/01/09 I think they would be fine as well, but.. - LordZ 08:06:07 03/02/09 The ramps you are showing are spanning with the - not4resaleZ 10:11:35 03/02/09 Now that I look at them again, - Keaner 13:45:21 03/02/09 Exactly, the wood would have to compress, the weight is not - Barry (NJ) 14:58:32 03/02/09 Keaner you are very wrong! - not4resaleZ 10:19:16 03/02/09 you would be better off with six 2x4's vertically - Adam (NoVA) 13:27:00 03/02/09 that ain't breaking. THere's not enough exposed surface - moxie (SF) 13:58:41 03/02/09 I've seen people split 2x12s with a chop from their hands. - not4resaleZ 18:57:09 03/02/09 Whats wrong with jack stands? - ZiNnYc 22:03:53 03/01/09 Nice Harbor freight stands (n/m) - WAM_Z32 22:57:00 03/01/09 jenga!!! (n/m) - Z-CARR 23:04:48 03/01/09 Looks good! What was your final cost? (n/m) - Spongerider :) 01:25:44 03/02/09 Total hits: Not enough - BigTDogg (MA) 07:29:41 03/02/09 (Total Hits: a lot). :-P (n/m) - Spongerider :) 10:59:38 03/02/09 No such things as overkill if someone is under the car. (n/m) - icsamerica 08:33:49 03/02/09 Agreed. (n/m) - AbsolutZ 09:45:27 03/02/09 isn't it a pain to get the car that high up with floor jack? - LJZTT 09:06:11 03/02/09 These are dangerous, not overkill. Not4resaleZ is right. - Yoshi 10:30:02 03/02/09 For those of you with concerns...the weight of the car - ZEVAN (Ca) 11:20:33 03/02/09 You're smart to use jack stands in addition. Just one break - Yoshi 13:14:25 03/02/09 Thanks. I think everyone got caught up in pictures and - ZEVAN (Ca) 14:14:30 03/02/09
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