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J. Schwiebert 11-04-2009 18:33:29 209.143.33.188 812920 Report to Moderator	What would miminum thickness be for a concrete slab with reinforcing wire to support a 12 X 16 foot storage shed? [Reply]   [No Email]
steve n carol 11-06-2009 21:45:50 71.110.65.26 813687 Report to Moderator	Re: Concrete slabs in reply to Alex.C, 11-04-2009 18:33:29   The building is not supported by the 'slab'. As mentioned, the footing around the perimeter (including the openings/doors), support the building and should all tied in with rebar. The size of the footing depends on the weight of the building. What are the walls made out of? Bricks, block, sheet metal? how high? 8', 14' etc. What kind of roof? (think about the weight). Also the footing holds down a structure...if it's attached to it, and it should be. As the wind goes over the top, it creates 'lift', like an airplane wing, not to mention tornados and such. Just ask Dorthy! If you have columns in the 'field' of the floor area, a footing ('spread footing) is appropriate, as that column or post will carry some weight as well. And, as mentioned, check with your county or city, they will give you a free design handout....sl   [Reply]   [No Email]
BillinCentralMo 11-05-2009 19:48:51 99.26.130.178 813384 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   If you're going to drive a tractor on it , 6" if you don't want it cracked. With all due respect 2" is not going to cut the mustard.   [Reply]   [No Email]
JRobbins 11-05-2009 09:49:34 170.142.158.4 813157 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   2" if you're not driving on it with a payloader or something just as heavy. 6" footing though.   [Reply]   [No Email]
Leland2 11-05-2009 11:44:30 173.29.62.160 813185 Report to Moderator	Re: Concrete slabs in reply to JRobbins, 11-05-2009 09:49:34   2" wilol just crumble go at least 4" or more and make sure the the fill is well compacted . If you can get it in your area use wash out from a redi mix plant or recycled concrete that stuff really packs tight .   [Reply]   [Send Email]
kyhayman 11-05-2009 06:51:42 99.196.32.58 813073 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Make sure you fix the sub-base correctly. I see more concrete and blacktop failures due to cutting corners on the backhoe, gravel, and compaction work than I do on the concrete. At to strength, I wouldnt even consider pouring that big a slab without rebar AND fiber unless you are cutting expansion joints in it.   [Reply]   [No Email]
NE IA 11-05-2009 05:20:36 206.72.18.153 813039 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Fiber is a secondary reinforcment, not to be confused with the most important reinforcment -rebar. A uniform subgrade is probably the most important thing required for a good job. If half the slab is a cut, and the other half is fill, it will crack 99% of the time in frost areas. Since 1964 I have never poured less than a 4,000 # mix. I would consider 6" if you can afford it, 4 is ok but this is simething you intend on doing once. Spend a few dollars and put chairs under the rebar so they are in place--lower 1/3 of slab. I argue these issues on a weekly basis, my coment is always --just drive around town and look for yourself, then come back and we will discus the issue. I am lucky to work for 99% of the folks that want it to be perfect in the end, not just get by.   [Reply]   [No Email]
02 11-04-2009 23:13:09 24.68.30.143 812991 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Make it a bit thicker where the posts sit.   [Reply]   [No Email]
David - Alabama 11-04-2009 21:05:29 74.163.51.103 812979 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   4" thick, 3000 lb mix will carry about anything you can put in a 12"x16". I would suggest a 12" wide x 12" deep footing around the perimeter (or deeper if your in extreme cold climate) to prevent washing out from under corners and to prevent frost upheavel.   [Reply]   [No Email]
Leroy 11-05-2009 13:48:21 209.143.52.170 813221 Report to Moderator	Re: Concrete slabs in reply to David - Alabama, 11-04-2009 21:05:29   His area will get to 20* below 0 or possibly more but not every year.   [Reply]   [No Email]
huntingreen2day 11-04-2009 20:54:36 68.114.129.14 812976 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Use wire or steel. Don't waste your money with the fiberglass.   [Reply]   [Send Email]
Sean Feeney 11-05-2009 04:31:09 71.124.235.201 813020 Report to Moderator	Re: Concrete slabs in reply to huntingreen2day, 11-04-2009 20:54:36   http://www.newnycon.com/techpapers/Concrete%20Reinforcement%20Nycon%20Fibers%20vs.%20Welded%20Wire%20Fabric.pdf   [Reply]   [Send Email]
J Mehaffey 11-04-2009 19:11:15 166.82.153.89 812947 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   4000 psi concret with fiber in it, no wire is needed cut expanstion joints down the middle and acrosst the middle. 4" will work as long as you have a good base, dirt or stone compacted. If you'r parking something heavy on it like 10,000 lbs or more I'd go with 6" of concret.   [Reply]   [No Email]
matt knoeck 11-04-2009 18:57:59 68.117.9.56 812937 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   4" should work   [Reply]   [Send Email]
Kow Farmer 11-04-2009 18:56:37 66.60.222.192 812936 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Hi J., I would go at least 4" thick with the floor. There are many variables here depending what you plan on using the storage shed for. If you want to park a vehicle in it I would also suggest using 1/2" rebar tied in a 2' square grid pattern for long lasting floor durability. Of course this all depends on your $$$ budget and the longevity of this building for your needs. Hope this helps you out. Kow Farmer   [Reply]   [Send Email]
Janicholson 11-04-2009 18:54:58 64.61.211.218 812935 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   With light material in it 4", with point loaded heavy stuff (a tractor, or jacking on some 6000 lb equipment) 6" If it is a permit required building it will be spec'ed in at the county/city engineers office. JimN   [Reply]   [No Email]
john hoffman 11-04-2009 18:54:02 67.236.78.91 812933 Report to Moderator	Re: Concrete slabs in reply to J. Schwiebert, 11-04-2009 18:33:29   Probably 4 inches with the wire in the center of the slab - that is if your subsoil in firm and your not planning on backing a heavy tractor there. It will probably crack, thats all the wire is for - to control cracks.   [Reply]   [No Email]