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Old 11-18-2011, 03:59 PM   #16
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Slab on grade foundation for a shed?


anchor bolts will actually hold the structure to the concrete.. concrete nails arent rated for what your intending to do.

after the concrete has been placed and cured, if you forgot the anchor bolts you can still bolt down the plates using a hammer drill and 1/2 bit.. then anchor it wedge anchors. as you tighten the nut the opposite end will spread creating more and more friction. i use them all the time in renovation situations and are accepted by code. concrete nails are not

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Old 11-18-2011, 04:20 PM   #17
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Slab on grade foundation for a shed?


We can use concrete nails here.
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Old 11-18-2011, 04:29 PM   #18
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Slab on grade foundation for a shed?


are you sure about that,, the hole point of anchor bolts is to hold structure down plates in extremely strong winds..

i would double check your info
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Old 11-18-2011, 04:32 PM   #19
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Slab on grade foundation for a shed?


We really dont have strong winds, but I will double check.
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Old 11-18-2011, 05:18 PM   #20
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Slab on grade foundation for a shed?


Nobody has strong winds, floods, hurricanes, tornado's, tsunami's, snow storms, floods, hail, sand storms, earthquakes, ETC ETC.
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Old 11-18-2011, 06:46 PM   #21
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Slab on grade foundation for a shed?


Of course you can use concrete nails, since you apparently don't need a permit. The point is not that you can use nails, the question is whether they will accomplish the goal of holding the foundation to the slab. They won't, anchor bolts will. But you can use toothpicks if you want, since you don't need a permit, and there are likely no design standards.

As for no wind in Montgomery, I disagree. I spent six months investigating damage after hurricanes Katrina and Rita, including a few tornado related incidents in northern Mississippi. You live in an area of the country that has tornado potential. Will the anchor bolts save your shed if a tornado hits? If it is a low grade tornado, very likely, especially if you use hurricane clips on the roof. But since it is a shed, you may not be too concerned about wind damage, and it may be economically justified to save the money on hurricane clips and anchor bolts, and accept wind damage in the event of a strong wind event. Your call.
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Old 11-18-2011, 09:17 PM   #22
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Slab on grade foundation for a shed?


yah, and this guys doesnt seem worried about having to drag his shed back to his property from 2 streets over when it starts to blow either.

if your not going to do something to code it better be because your going above and beyond code.. i dont kow how many times inspectors have shook their head at me because of being "captain overkill" they liked what they saw but were happy they werent the one paying the bill to get it done
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Old 11-19-2011, 06:33 AM   #23
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Slab on grade foundation for a shed?


Check this out- I don't need hold down bolts they are not required. Meanwhile there's a windstorm and the shed lifts off the slab and blows through a couple yards and thousand's dollars damage to the neighbors property, oh well I say it's only a shed I lost.

Check this out we're driving in the car everyone has seat belts on except one person he says I don't need it. Meanwhile we get in an accident and the guy that wouldn't put the belt on flys around in the car and kills two other people and he is not seriously injured.

The Point, who cares about what happens to other peoples property or lives.
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Old 11-30-2011, 10:21 PM   #24
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Slab on grade foundation for a shed?


Just dig a trench around the perimier of the slab to act as a small footing. It's sometimes referred to as a "turn down slab"
You can pour it all at once.
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Old 12-01-2011, 09:04 AM   #25
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Slab on grade foundation for a shed?


Thanks guys for the advise.
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Old 12-02-2011, 07:41 AM   #26
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Slab on grade foundation for a shed?


What's going to happen if you do not take the extra time and money to pore this much higher then the surrounding grade is the splash back evertime it rains will rot out the siding and water can get under the bottom plates and into the building.
The slab should not be any bigger then the foot print of the shed. If it is then water will work it's way in.
I'd also have an exterminater come out and do a fan spray before the slab goes in to stop termites from coming in.
It would be best to also lay 6 mil. plastic before the pore to stop moisture from coming in throught the slab.
I've torn down many sheds and had to replace more then a few bottom plates in slab floor homes.
Everyone thinks because they have a slab there less chance of termites. Not true. The building is closer to the ground and one crack and there in.
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Old 12-02-2011, 09:06 AM   #27
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Slab on grade foundation for a shed?


I am going to build up the yard with aleast two or three truckloads of sand. Spraying for termites is a good idea.

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