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Cogito Ergo Sum
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Considering anchor bolts will hold a sign 100'+ in the air with considerable wind load, I'd say they would fit the bill for this job.
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09-22-2014, 12:57 PM
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Plan B............
Went with this design. It took 2 1/2 yds of high strength concrete plus some #4 rebar. When the existing slab was cut open, it proved to be a full 4" thick except for a void where I needed to mount a lift post. The hole was dug so that the new pour would lock under the existing slab on all sides. So now, I have a monolithic base block that weighs approximately 6500 lbs and is held in place by the rest of the slab. The new base is approximately 11 1/2 feet wide by 5 1/2 feet front to rear. Once I get the anchors properly set, I don't think there will be any problems with the posts staying put! The original contractor picked up the labor cost and I paid for the concrete. Might be the best money I ever spent!
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FEC3 1980 911SC coupe "Zeus" 3.3SS god of thunder and lightning |
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09-24-2014, 04:19 AM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,820
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Quote:
Congrats to your efforts. Last edited by john70t; 09-24-2014 at 08:19 AM.. |
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09-24-2014, 08:16 AM
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Join Date: Sep 2009
Location: North of You
Posts: 9,160
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1. Steel subplate that is about 24" square under each foot.
2. Bolt or weld the existing foot to the subplate 3. Attach the subplate using multiple chemical anchors 4. Test before you get under a car or a 48" deep sonotube.
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"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands." |
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09-24-2014, 08:25 AM
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Post concrete work cleanup...........
Cutting a major hole in a concrete slab makes a TON of concrete dust! Even though everything was covered (as well as possible) with plastic sheeting, everything got a good dusting of fine concrete powder. I have spent the last couple of days cleaning up using a shopvac, an airhose and a bucket of water w/wet rag to eliminate the mess. I've got two storage shelves to go and all will be back to "normal". The mess would have been worse except for the two ceiling fans and a box fan that blew most of the dust out the front door. At least now I can get in the shop without having to wear a face mask! A few more days and the new concrete will be at 70-80% strength and I can set the anchors for the lift posts (YEA)!
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FEC3 1980 911SC coupe "Zeus" 3.3SS god of thunder and lightning |
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09-27-2014, 05:44 AM
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1986 Porsche 944 2.5l
Zeus (god of thunder and lightning)
