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Mounting lights on concrete ceilings #69356
09/06/06 06:23 PM
09/06/06 06:23 PM
Y
yanici  Offline OP
Member
Joined: Sep 2006
Posts: 58
Atlantis
It is my practice to surface fasten light fixtures (i.e. flouescent strips) in ceilings using steel drop in anchors. The reasoning being that in a fire the anchors will hold up and the fixtures will not fall on the firefighters.

I was curious if lead anchors or plastic anchors (in a light weight light) can be used or if there is some code on this.

Work Gear for Electricians and the Trades
Re: Mounting lights on concrete ceilings #69357
09/06/06 06:44 PM
09/06/06 06:44 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,179
Estero,Fl,usa
I see a lot of TapCon screws in this sort of work.


Greg Fretwell
Re: Mounting lights on concrete ceilings #69358
09/06/06 06:50 PM
09/06/06 06:50 PM
Y
yanici  Offline OP
Member
Joined: Sep 2006
Posts: 58
Atlantis
Yeah. Tapcons are nice. Some guys shoot a 1/4 x 20 stud too. I never seem to have the gun with me though.

Re: Mounting lights on concrete ceilings #69359
09/07/06 12:38 PM
09/07/06 12:38 PM
Y
yanici  Offline OP
Member
Joined: Sep 2006
Posts: 58
Atlantis
I'm still curious if there is some code on this, maybe even building code.

Re: Mounting lights on concrete ceilings #69360
09/07/06 01:25 PM
09/07/06 01:25 PM
Z
Zapped  Offline
Member
Joined: Oct 2002
Posts: 482
Huntington Beach, CA, USA
Another vote for TapCons here, with the addition of a washer - a fender washer if there's enough room.

Re: Mounting lights on concrete ceilings #69361
09/07/06 03:08 PM
09/07/06 03:08 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,179
Estero,Fl,usa
TapCons are becoming the defacto standard for concrete/block fastening around here until you get up to "red head" sizes.
They even use TapCons for fastening "hurricane clips".


Greg Fretwell
Re: Mounting lights on concrete ceilings #69362
09/07/06 06:38 PM
09/07/06 06:38 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
We used to use lead anchors, than we stopped and changed to steel anchors.

We where told it was a code violation to use lead anchors for vertical supports.

I have no idea if it is actually true.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: Mounting lights on concrete ceilings #69363
09/07/06 08:19 PM
09/07/06 08:19 PM
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
I have found the lighter anchors, of any type, to be inadequate to reliably supporting a light... even a small one!

Tapcons are good, and are the only fastener to use if there is a sheet of steel over the concrete.

Drop ins, or their relativem the "mushroom" stud, are another good choice. The studs seem to help you line things up.

For drywall ceilings, toggles are the only way to go.

Re: Mounting lights on concrete ceilings #69364
09/07/06 09:11 PM
09/07/06 09:11 PM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
Lead has a relitively low melting point, it may be on of the first things to fail in a fire. In dropped cielings I just get the cieling installer to shoot my support wires to the lid. Regular cieling, if I had not already cast in the light or support into the pour, Tap con, and if it's heavy, a lttle epoxy too. If its really heavy I break out the Hilti catolog for the under-cut anchors, and some epoxy... http://www.us.hilti.com/holus/modules/prcat/prca_navigation.jsp?OID=-11561


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: Mounting lights on concrete ceilings #69365
09/08/06 06:23 AM
09/08/06 06:23 AM
N
NJwirenut  Offline
Member
Joined: Sep 2001
Posts: 806
Bergen County, NJ
I like a sleeve anchor called a "PowerBolt":
http://www.powers.com/product_06914.html


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