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Concrete Anchor
Posted on 7/23/14 at 8:22 am
Posted on 7/23/14 at 8:22 am
I am in the process of building an 8x10 shed on an existing slab, and I am to the point where I need to anchor the walls to the slab. What is the best type of anchor to use in this application?
9
Posted on 7/23/14 at 8:27 am to ljd4662
More than likely newer things out there now. We used to use what the old timers called Acme Johnson's. You drilled a certain size hole, drop the anchor in, set with given setting tool and screwed machine screw into it.
Use big washers and drill the plate a little bigger for ease of placing.
Use big washers and drill the plate a little bigger for ease of placing.
Posted on 7/23/14 at 8:41 am to ljd4662
Posted on 7/23/14 at 8:47 am to DownSouthDave
quote:What kind of license?
Licensing required
Posted on 7/23/14 at 8:53 am to ForeverLSU02
I think you're supposed to be licensed to use it. But I don't think you need to be licensed to purchase it. I don't think you will have any trouble buying one from HD.
Posted on 7/23/14 at 9:01 am to ljd4662
Drill anchor Bolt holes and use all thread and expoxy them
In place
In place
Posted on 7/23/14 at 9:07 am to djangochained
How old is the slab? If very old, it's going to be a bitch to drill. use a ramset. 
You might be able to rent one from AAA rental.
You might be able to rent one from AAA rental.
Posted on 7/23/14 at 9:09 am to ljd4662
Red Head 1/2" sleeve anchors. You can drill right through the bottom plate and set them so you don't have to layout drill holes more than once.
Posted on 7/23/14 at 9:10 am to djangochained
RedHeads
1/2 x 4-1/2 RedHead concrete anchor.
Not if you use a hammer drill. Can be rented by the hour/day for not much.
1/2 x 4-1/2 RedHead concrete anchor.
quote:
How old is the slab? If very old, it's going to be a bitch to drill.
Not if you use a hammer drill. Can be rented by the hour/day for not much.
This post was edited on 7/23/14 at 9:13 am
Posted on 7/23/14 at 9:16 am to ljd4662
ramset or tapcons
Just 2x4 framed walls correct?
Just 2x4 framed walls correct?
Posted on 7/23/14 at 9:19 am to NYCAuburn
quote:
Just 2x4 framed walls correct?
Yeah, but I am worried about the strength of tapcons if a hurricane were to come through.
Posted on 7/23/14 at 10:10 am to ljd4662
quote:
Yeah, but I am worried about the strength of tapcons if a hurricane were to come through.
The anchors will hold if drilled and epoxied in place.
Follow the load path from roof down and install Simpson strong tie clips where needed
Posted on 7/23/14 at 10:10 am to ljd4662
quote:
the latest high wind construction guides for slab on grade construction require straps embedded in the concrete and nailed to the bottom plate or the wall studs, or 5/8-inch diameter anchors bolts spaced at 18 inches or less. They also require 3-inch by 3-inch by 1/8-inch thick washers between the nuts and the bottom plate if anchor bolts are used. If you have a wood frame floor, anchor bolts don't work.
quote:
Wall bottom plates shall be anchored to a slab-on-grade foundation system with anchor bolts having a minimum bolt diameter of 5/8 inch and 3"x3"x1/8" washers. A minimum of one anchor bolt shall be provided within 6 to 12 inches of each end of each plate. Anchor bolts shall have a minimum embedment of 7 inches in concrete slabs-on-grade. Anchor bolts shall be located within 12 inches of corners and at spacings as specified in Table 303.3.2 for anchor bolts resisting lateral, shear, and uplift loads. Approved alternative plate anchors and wall anchoring systems shall be installed in accordance with the manufacturer’s published recommendations and shall meet the following design requirements.
This post was edited on 7/23/14 at 10:20 am
Posted on 7/23/14 at 11:11 am to ljd4662
I'm a contractor. Use the redheads, get them at Home Depot. They work well, do not use ramset nailer. Good shear ability, but will pull straight up out of slab. Most will also spall and just bust up concrete below plate (especially on older slabs that are mostly aggregate.)
Posted on 7/23/14 at 12:24 pm to Tigerinthewoods
make sure to follow the directions on redheads to a T. Proper depth hole and blow it out after. Once you drive them in, you're not getting them out.
Posted on 7/23/14 at 12:41 pm to kook
Better than blowing would be to run the drill bit up and down to evacuate the hole while running your shop vac to pic it up at the same time.
Posted on 7/23/14 at 1:45 pm to ljd4662
1/2"x6" titen bolts. Don't buy them from Lowes or Home Depot go to a building material store. People at Lowes and Home Depot are morons.
Posted on 7/23/14 at 8:49 pm to Tigerinthewoods
Also, if you use the drive in type to set them, run the nut out to the tip. Hit that, then tighten the nut, otherwise the threads tend to get all jacked up.
Posted on 7/23/14 at 9:00 pm to ljd4662
What does Chicken do to Vette Guy's threads?
quote:
Concrete Anchor
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