attaching PT 4x4 to concrete slab horizontally

Homerboy

Lifer
Mar 1, 2000
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Friend wants to make a makeshift "curb" in their parking spot at their house. I figured slapping down a 4x4 onto the slab would do the trick.
Counter bore some holes in the 4x4 then attach with 3/8" concrete anchors?

Is that not right? Something better?
 

Greenman

Lifer
Oct 15, 1999
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Pick whatever works for you. Tapcons, lead shields, epoxy, they'll all work. You can even use a couple pegs of 1/2" rebar. It doesn't matter if the 4x will lift up because the load is always lateral.
 
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Homerboy

Lifer
Mar 1, 2000
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Pick whatever works for you. Tapcons, lead shields, epoxy, they'll all work. You can even use a couple pegs of 1/2" rebar. It doesn't matter if the 4x will lift up because the load is always lateral.
Yeah was thinking some 4" tapcons too. Counter bore the 4x4 2" down so the tapcon gets into slab 2". Space about every 18" or so (whatever works for the overall length)
 
Nov 17, 2019
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I just laid the 4 x 4 on the floor. It doesn't move as the tires are taller than it and they tend to push it down more than move it.

But that's inside a garage and might not work as well outside.

I'd look at some tar/roof sealant as a n adhesive of sorts.

Railroad tie might be an option. Many lumber and rural suppliers have them for $20 or less. Since the weigh far more than a 4 x, they are less likely to move, but they might be too high for smaller vehicles.

I'm generally opposed to drilling holes in concrete outdoors. Makes for more rapid failure due to water infiltration and freezing/spalling.
 

Homerboy

Lifer
Mar 1, 2000
30,890
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I just laid the 4 x 4 on the floor. It doesn't move as the tires are taller than it and they tend to push it down more than move it.

But that's inside a garage and might not work as well outside.

I'd look at some tar/roof sealant as a n adhesive of sorts.

Railroad tie might be an option. Many lumber and rural suppliers have them for $20 or less. Since the weigh far more than a 4 x, they are less likely to move, but they might be too high for smaller vehicles.

I'm generally opposed to drilling holes in concrete outdoors. Makes for more rapid failure due to water infiltration and freezing/spalling.

Oh I like the railroad tie idea. The area is sort of weird - it's a "pad" in an alley. So tossing down a RR tie, maybe even just toss some adhesive on the backside will be more than enough
 
Nov 17, 2019
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At 8 1/2 feet, they're more than wide enough for most vehicles. Averaging around 200 pounds, they won't move unless you really want them to.
 

Greenman

Lifer
Oct 15, 1999
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If you can drill a 1/2" hole in the wood and concrete just drive a piece of rebar through the whole thing.
 

[DHT]Osiris

Lifer
Dec 15, 2015
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At 8 1/2 feet, they're more than wide enough for most vehicles. Averaging around 200 pounds, they won't move unless you really want them to.
If you hammer some nails top and cut the heads off of 'em you'll be sure nobody bumps into them unless they really feel like it.
 

jmagg

Platinum Member
Nov 21, 2001
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Pinning with rebar is the best solution. Glue wont hold for long.