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Old 08-24-2012, 10:39 AM   #1
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Best screws for securing EMT to concrete


What are the best screws for securing EMT to concrete? Iíve tried Tapcon concrete screws for other applications, but they donít seem to work well sometimes. Sometimes I've had them break on me, or not hold well.

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Old 08-24-2012, 10:56 AM   #2
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Best screws for securing EMT to concrete


Tapcons are the best IMO. If you do not use the correct size drill bit or do not blow out the dust from the hole, you can break screws. You must use care when installing this type of fastener. Follow the directions.
For a more permanent job, use "drive pins" or "nail in's" as we call them in the trade. You just drill the hole, insert the drive pin sleeve and hammer in the pin. Very secure, but can only be removed with a chisel and hammer.

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Old 08-24-2012, 04:53 PM   #3
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Best screws for securing EMT to concrete


if i'm not mistaken a 1/4 inch "drive pin" which i assume is our drop in anchors are good for 900lbs each. Agreed, they'll hold pretty much anything.

we mount almost all our stuff to concrete, any pipe smaller than 1 1/2" we use a quarter inch sds bit and ucan aluminum anchors with a number ten metal screw in them. They work exceptionally well but you have to pick your spots if using in block.
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Old 08-24-2012, 06:26 PM   #4
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Best screws for securing EMT to concrete


10x1 sheet metal screws and plastic anchors work well for most sizes encountered in a house.
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Old 08-24-2012, 07:14 PM   #5
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Best screws for securing EMT to concrete


I vote for TapCons. I haven't used plastic anchors in years.
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Old 08-24-2012, 08:23 PM   #6
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Best screws for securing EMT to concrete


i'm so glad we don't use the plastic anchors any more. The ucans are much easier to use and hold more. For everyday house stuff though they should be plenty strong enough. I just always found them a pain in the butt.

tapcons are good too but take practice, if you mess it up even a little they won't hold right.

http://www.ucanfast.com/products/det...&productid=112
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Old 08-24-2012, 08:34 PM   #7
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Best screws for securing EMT to concrete


Most tapcon problems are user error. Make sure when you do the pilot hole its best to use a hammer drill with the masonry bit and make sure the bit doesnt "walk around" inside the hole
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Old 08-24-2012, 08:38 PM   #8
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Best screws for securing EMT to concrete


You also have to make sure your hole is deep enough. A shallow hole will snap a tapcon every time
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Old 08-24-2012, 08:42 PM   #9
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Best screws for securing EMT to concrete


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Originally Posted by Eds_tls View Post
You also have to make sure your hole is deep enough. A shallow hole will snap a tapcon every time

Yes I forgot to add this to my post above
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Old 08-25-2012, 03:09 AM   #10
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Best screws for securing EMT to concrete


Quote:
Originally Posted by Jim Port View Post
10x1 sheet metal screws and plastic anchors work well for most sizes encountered in a house.
We use tapcons first. If they fail, then we will drill out the hole to ľ" and install the plastic anchors with #10 HWH stainless steel screws.

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