Experience With Tapcon Heavy Duty Anchors? - Building & Construction - Page 2 - DIY Chatroom Home Improvement Forum
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Old 10-08-2014, 11:16 AM   #16
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Around 3.5". I agree that installing them by hand is the way to go, especially if you are close to the edge.
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Old 10-08-2014, 11:27 AM   #17
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Thanks, I will probably drive them in by hand just for a little extra piece of mind. I'm torn between going with 3/8 or 5/16. I think for the little price difference and difference in holding power, I'll go with the 3/8. I plan to be 2-3" from the edge. Concrete is relatively new, only about 2 months old.
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Old 10-08-2014, 11:36 AM   #18
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Do you know how thick it is? I know that some of the bigger ones aren't threaded on the top 4" so they may end up more like pegs if the concrete is relatively thin.
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Old 10-08-2014, 11:47 AM   #19
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The concrete is about 6"+ thick. It looks like the 3/8x3 tapcons are threaded to whole way. The 4" ones have an unthreaded portion at the top, my guess is that's for fastening thicker objects like studs where you don't necessarily want the threaded portion in whatever you're fastening to the concrete.
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Old 10-08-2014, 11:50 AM   #20
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Quote:
Originally Posted by Durt Ferguson View Post
Thanks, I will probably drive them in by hand just for a little extra piece of mind. I'm torn between going with 3/8 or 5/16. I think for the little price difference and difference in holding power, I'll go with the 3/8. I plan to be 2-3" from the edge. Concrete is relatively new, only about 2 months old.
ultimate holding strength is simply the tensile strength, which is same for both but the 3/8" will have higher yield because its beefier.

i note though, the holding strength will be far lower than screw yield, thus its highly dependent on proper hole sizing and base material. you might find Red Head wedge anchors to be a better choice, just be sure to choose proper size for the job, dont over-do it, etc. its important to remove as much dust as you can from the hole prior to use.
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Old 10-10-2014, 10:04 AM   #21
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You need to use hilti, or other type of bolt system. Not tapcons.
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Old 10-11-2014, 03:21 AM   #22
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I think the product was good
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Old 10-11-2014, 09:23 PM   #23
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I drill the pilot holes with my hammer drill and the bit that comes with the fasteners. Then I blow the dust out of the holes with compressed air.(makes all the difference). I'll spin the screws in most of the way with my driver and finish the last couple of turns by hand with a nut driver. I will sometimes add a small squirt of silicone caulk prior to installing the screws. It acts as a lube on the way in, and holds like glue once it sets.
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Old 10-12-2014, 03:12 PM   #24
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Originally Posted by Davejss View Post
I drill the pilot holes with my hammer drill and the bit that comes with the fasteners. Then I blow the dust out of the holes with compressed air.(makes all the difference). I'll spin the screws in most of the way with my driver and finish the last couple of turns by hand with a nut driver. I will sometimes add a small squirt of silicone caulk prior to installing the screws. It acts as a lube on the way in, and holds like glue once it sets.
dry silicone also acts a lubricant for screw to back out on. if anything, use a drop of a slow set epoxy on end of screw, but i try to not use anything if i dont have to.
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