concrete anchors

[RicodJour]

Did the concrete fail or did the anchor just pull out? If the concrete failed, the concrete may have been too green or the embedment of the anchor wasn't enough. The hole may also have been oversized (happens even with the correct size bit if the bit is even a little bit bent or you didn't hold the drill steady enough).

Epoxy and threaded rod works well. You can even use epoxy with that same threaded anchor. Make sure you use compressed air to blow out the holes so the epoxy is sticking to clean concrete and not concrete dust.

R

[RicodJour]

Did the concrete fail or did the anchor just pull out? If the concrete failed, the concrete may have been too green or the depth of embedment of the anchor wasn't enough. The hole may also have been oversized (happens even with the correct size bit if the bit is even a little bit bent or you didn't hold the drill steady enough).

Epoxy and threaded rod works well. You can even use epoxy with that same threaded anchor. Make sure you use compressed air to blow out the holes so the epoxy is sticking to clean concrete and not concrete dust.

R

[Longshot]

I attempted to anchor 5/4 decking to the top of a poured concrete wall & used 3/8 x 3 wedge anchors, they pulled right out. anyone have another suggestion? its a frame for a bulkhead type door & will have significant weight hinging on it.

thanks! Rob

[DanG]

It seems quite unusual to be able to pull out wedge anchors. Is it an extremely sandy (weak) concrete?

There are several other types of anchors:

I would go here for examples:

If you have sandy concrete, I would not expect tapcon type anchors to work. Look at the mechanical anchors, find the impact anchors. I have had good luck having these hold in some iffy installs and also the pin anchors. Lok-bolt and Power-bolt are examples of sleeve type anchors which spread the tension to a larger area than the wedges.

The highest strength install will be epoxy anchors. Listed as adhesive and foams. They can be a bit expensive.

(top posted for your convenience) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Keep the whole world singing . . . . DanG (remove the sevens) [e-mail]

[I R Baboon]

tapcons.

[Rudy]

How "snug" were the holes you drilled ?

Didja BANG on the end of the Redhead before starting to crank down the nut ?

R