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self tapping screws #39589
06/26/04 10:46 AM
06/26/04 10:46 AM
C
CRM  Offline OP
Member
Joined: Feb 2004
Posts: 74
Alberta Canada
I have a question on securing conduit to metal Q decking used in commercial buildings. I usually use self tapping sheet metal screws. The last job we were on concrete was poured on top of the Q decking. What type of screw do you use that first has to go through metal then through concrete. Thanks for any help.

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Re: self tapping screws #39590
06/26/04 11:24 AM
06/26/04 11:24 AM
D
DougW  Offline
Member
Joined: Jun 2003
Posts: 1,143
North Chicago, IL
I've been a pretty big fan of the Tapcon system

[url to follow]

It's easy, quick, and the carbide tip should be able to punch through the decking to anchor in the 'crete above.

Re: self tapping screws #39591
06/26/04 11:38 AM
06/26/04 11:38 AM
D
DougW  Offline
Member
Joined: Jun 2003
Posts: 1,143
North Chicago, IL
I've been a pretty big fan of the Tapcon system
http://www.itwbuildex.com/tapcon.htm

It's easy, quick, and the carbide tip should be able to punch through the decking to anchor in the 'crete above.

Re: self tapping screws #39592
06/26/04 11:47 AM
06/26/04 11:47 AM
C
CRM  Offline OP
Member
Joined: Feb 2004
Posts: 74
Alberta Canada
Thanks Doug for the help, that looks like the masonary screws I'm going to buy.

Re: self tapping screws #39593
06/28/04 07:06 PM
06/28/04 07:06 PM
J
Joey D  Offline
Member
Joined: Oct 2003
Posts: 259
Arlington MA U.S.
I use a Hilti and just drill thru the decking then use the proper anchor for the job, plastic or steel a drop in

Re: self tapping screws #39594
06/29/04 12:02 PM
06/29/04 12:02 PM
G
GETELECTRIC  Offline
Member
Joined: Oct 2003
Posts: 172
toronto canada
I bang the corner of the flute with a hammer
which loosens up the concrete an a sef tapping screw will go right in.


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