I'll be pouring a slab today. how many anchor bolts?

Since it was for a shop (30x50) I was think that I need at least 1 anchor bolt for each 8' of wall section. But Im reading they should go every 16" or every 48" so Im confused.

At every 48", thats a lot of bolts. every 16" is a ton of bolts.

What is standard?

aarcuda said:

What is standard?

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First off, use 10 inch J bolts, you need 7 or 8 inches of depth into the concrete. An 8 inch J bolt is too short.

Every bottom plate needs a minimum of 2 bolts. There must be an anchor bolt within 12 inches of each end. And the maximum spacing between any bolts on a single bottom plate is 6 feet. I put my anchor bolts six inches from the end of each bottom plate.

Thus a (8 to 12) foot bottom plate would need three (3) anchor bolts. A 16 foot bottom plate would need 4 anchor bolts.

I wet set my anchor bolts, but is would be easier if you could have them already in place before you pour. That way they are in the correct place and will not be forgotten. You can use a 2x4 connected to the form to hold the anchor bolt in place during the pour.

Goodluck...

Code here is no more than 6' between bolts and on all corners. In my opinon, you can never have too many bolts.

The books I've been reading lately have all said 4' and at the corners.

Here, I'm not sure what the code is (probably 4 feet), but the architects all specify 32 inches OC and at the corners. My inspector didn't care about the length of the J bolts as much as making an effort to get the end under the 3/8 inch rebar in the pad.

Thanks. I ended up using a bolt every 5'.