ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: 1 [2]  All   Go Down

Author Topic: Whats our feeling on (conduit) beam clamps for permenant hanging?  (Read 1344 times)

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1742
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #10 on: June 30, 2017, 12:06:42 am »

I chose my words carefully. I said transfer of risk, not that it would fail.

Unfortunately I did leave a word out by accident lol

Sent from my iPhone using Tapatalk

Better call a structural engineer to see if those red iron beams will carry the load from the lighting fixtures.  ;)
Logged
Authorized Dealer for: JBL, Crown, Soundcraft, dbx, Lexicon, AKG, BSS, Sennheiser, CBI Cables, Countryman, ProCo Sound, Da-Lite Screens, Dunlop, Digitech, Grundorf, Lumastream Lighting, Hosa, Gator Cases, Perdue Acoustics, Optoma, Cosmic Truss, and others. jlsoundpro@gmail.com

Using: JBL VP tops, subs, and monitors, Si Performer

BrianHenry

  • Full Member
  • ***
  • Offline Offline
  • Posts: 166
  • NJ
    • Mountainside Studios, LLC
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #11 on: June 30, 2017, 12:30:09 am »

Better call a structural engineer to see if those red iron beams will carry the load from the lighting fixtures.  ;)

Well now that you mention it... ;)


Sent from my iPhone using Tapatalk
Logged

duane massey

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1362
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #12 on: June 30, 2017, 01:10:24 am »

Used to drill holes (many years ago) until the liability issue was pointed out. My only issue with beam clamps (and a minor one) came from seeing a plumber over-torque one and break it in half. However, considering some of the many far worse practices I have seen in THIS area, beam clamps are my first choice, with safety cables.
HOWEVER, I have seen several installs where the safety cable was attached TO the beam clamp.......
Logged
Duane Massey
Technician, musician, stubborn old guy
Houston, Texas

Jamin Lynch

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1742
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #13 on: June 30, 2017, 01:26:23 am »

If you're scared to drill a hole, at least use one of these.
Logged
Authorized Dealer for: JBL, Crown, Soundcraft, dbx, Lexicon, AKG, BSS, Sennheiser, CBI Cables, Countryman, ProCo Sound, Da-Lite Screens, Dunlop, Digitech, Grundorf, Lumastream Lighting, Hosa, Gator Cases, Perdue Acoustics, Optoma, Cosmic Truss, and others. jlsoundpro@gmail.com

Using: JBL VP tops, subs, and monitors, Si Performer

John Fruits

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 551
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #14 on: June 30, 2017, 05:19:10 am »

There are also the rated purlin clamps.
http://www.thelightsource.com/products/112/view
Logged
"The music business is a cruel and shallow money trench, a long plastic hallway where thieves and pimps run free, and good men die like dogs.  There's also a negative side."-Hunter S. Thompson

James Feenstra

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 686
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #15 on: July 01, 2017, 10:48:41 am »

What could possibly go wrong?  ::)

Drill and bolt in place for me. Might be harder but it's safer
why would you drill anything to use this style of beam clamp? they are not designed to be attached through holes
Logged
Elevation Audiovisual
www.elevationav.com
Taking your events to the next level

Steve Kosiba

  • Newbie
  • *
  • Offline Offline
  • Posts: 15
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #16 on: July 02, 2017, 06:39:39 pm »

These type of beam clamps, when the proper clamp is used for the proper beam and load limits are adhered to, are perfectly fine for permanently mounting static fixtures (ellipsoidals/PARs/&c).  For moving lights, however, I'd want a more proper clamp that grabs both sides of the beam.  As always make sure to use safety cables, and in this case wrap it around the entire beam.  Sometimes this means getting longer safety cables.
Logged

Dave Garoutte

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 622
  • San Rafael, CA
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #17 on: July 03, 2017, 08:01:22 pm »

Drilling a hole probably won't cause problems from the weight of the fixture, but when there is a ton of wet snow on the roof, that stress riser could be fatal.
Logged
Events. 
Stage, PA, Lighting and Backline rentals.
Chauvet dealer.
Inventor.

Stephen Swaffer

  • Hero Member
  • *****
  • Online Online
  • Posts: 1856
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #18 on: July 03, 2017, 08:54:31 pm »

There are also the rated purlin clamps.
http://www.thelightsource.com/products/112/view

The last time I asked for an engineer's opinion on loads from a purlin, the drawing I was given only allowed loads to be attached to purlins via an angle bracket tek screwed to the vertical portion of the purlin- nothing was to be attached to the horizontal flange.

Honestly, I think that was purely to shift liability, as I don't know that I've seen an install done that way.
Logged
Steve Swaffer

BrianHenry

  • Full Member
  • ***
  • Offline Offline
  • Posts: 166
  • NJ
    • Mountainside Studios, LLC
Re: Whats our feeling on (conduit) beam clamps for permenant hanging?
« Reply #19 on: July 03, 2017, 09:13:29 pm »

Purlins are different from the I beams pictured above. Z purlins for example are rarely rated for loads above and beyond the live+dead roof loads. Also z purlins will easily deform under additional point loads. This doesn't mean they won't support a few fixtures but there is more than insignificant risk when dealing with some purlins.


Sent from my iPhone using Tapatalk
Logged
Pages: 1 [2]  All   Go Up
 


Page created in 0.098 seconds with 18 queries.