Concrete anchor removal

[edl]

drilled and set anchors to mount a winch on the floor or moving cars without motors - one of them as gone it at an angle - tried to straighten it with the punch, but only succeeded in setting it - it is a 1/4 inch "Red Head" brand "drop in" anchor - how can i get it out?? - drill it out? - other? - if drilling, i assume a bit for steel...left handed? - other? - thanks!! ed

 

[Yotaforce]

Drilling may just result in spinning the anchor. I would weld a chain link to it and yank it up with a cherry picker, but that could break a chunk of concrete out with it. Cut it off flush, drill a new hole about an inch away on your mounting plate, bolt it down with the other anchors and try again. Remember, use water to help drill the hole.

 

[edl]

would do the move it an inch, but have 7 other anchors already in and lined up for the winch plate...this is the only one that messed up...any chance a dremel with some kind of bit on it would work??

 

[MXtras]

Sounds like you are in for a long day....

I know of no quick fix. I have seen days of lost time due to out of place machinery anchors in industry. There is little you can do other than drill the thing out, relocate or make a sill plate. For this, the sill plate seems a little silly, so I say drill it out with a standard drill. Keeping it from rotating is going to be a trick, though.

Scott

 

[Franz©]

Which of the over 100 Red Head anchors are you talking about?

If it's a sleeved drop in stud that wedges into the sleeve as you pull against it, drive it down flush and forget about it, or cut it off flush with a cutoff wheel. You aren't going to salvage the hole, so you'll need to relocate the hole in the anchor plate.

If it's a self drilling redhead you are so screwed. Just cut it off and abandon the hole.

 

[Vicegrip]

If it is a center wedge drop in. The type where you drop it in and then set the wedge to hold. Drill out the center of the wedge run in some all thread and pull the anchor out. If the wedge starts spinning reseat it and keep drilling until you hog out the center of the red head. Then pull. If you are having hard time pulling the hogged out anchor you can thread in some all thread, drill a hole in a 2X4 about 6 inches from one end and drop it on the all thread. Drop a big washer on the all thread and then run a nut down. Pull up. you might make a big *** spall in the floor.

 

[Charles (in GA)]

Do you really need all eight anchors? cut if off and forget about it. Seven ought to do.

Charles

 

[edl]

charles - i actually need this one - the plate has 11 - 4 at each end to anchor the plate and 3 in a triangle that the winch bolts through - this is one of those 3 - there is actually very little room on the winch base plate where i could drill a new hole and then access it to fasten it - so i think i need to try to get this anchor out

franz - this is the item: http://www.grainger.com/Grainger/ww...op-In+Anchors|Flange&searchIndexId=2&x=23&y=8

given all of this, it seems that drilling it out may be the best answer - this is the kind where there is a piece in the middle just below the threads and you use a punch to set it - so maybe what vice says is the key - drill with narrow bit to get that stuff out as this will allow the wedge to ease?

 

[Franz©]

Slug in, no problem, it's soft steel, leadloy, Lock it in place and drill it.
Preventing the drill from wandering will be dificult unless you can place the anchorplate over the top for a drillbushing.

If you can't do a bushing use a series of twistdrills to chew it out in increasing steps.
When you get about 3/4 drilled out you should be able to employ a flat face punch to collapse the shell.

Get yourself soem Porock expanding concrete patch and fill the hole after drilling the anchor. 24 hours later, you can redrill. You'll definitely need a bushing then.

 

[V-10 Killer]

Could you measure how many degrees off plumb it is, and have someone with a mill custom make a "corrective" washer? You might be able to use it after all. I dunno, just thinking out loud...

 

[jamm]

Set the anchor in place, drill and tap the internal slug. If the slug spins, just reset it and continue to drill. Thread in a bolt and pull the slug up. This will release the pressure on the side of the drop in and allow the slit to close up. The anchor then will come out the same way it went in. Fill the hole with porock or expanding epoxy (most concrete supply places will have this). I prefer to use Hilti products, but any should work. Re-drill the hole for the new anchor to a deeper depth and use a longer bolt to accomodate the difference.

Good luck.

 

[edl]

thx guys ... will give the drilling out a try (probably over the weekend) and report back...