threaded rod

[electricalperson]

how do you select the size threaded rod needed to support different weights? what size rod will be needed to support the 620lb transformer? ive been trying to find information on google and i cant seem to find the information needed. the thread on hanging a transformer got me thinking

 

[emahler]

check with the manufacturer...look at Powers for the anchors and their load rating. Look at the manufacturer of the threaded rod. Their cut sheets will have all that information available

here is the ratings for different sized rod, in different concrete, with the Powers double expansion anchors

 

[bjp_ne_elec]

Check this thread out - there was a link to Hilti fasteners and it had quite a bit of info. Looks like they list it for 3000 PSI lightweight deck concrete - this would definitely be nice info to has - as far as the PSI of the concrete. I've used some of the EW6H and W10 series studed fasteners through metal pan decks before. WI also remember hanging a pretty hefty transformer above all the electrical closets, and I think it was overkill - but we used four 1/2" threaded with Unistrut slung on it. The transformers probably went about 400 lbs.

 

[electricalperson]

thanks guys. sometimes i think of questions to ask to things i dont have the answer too :grin:

 

[bjp_ne_elec]

Sorry - just realized I didn't post link:

http://forums.mikeholt.com/showthread.php?t=91337

 

[ITO]

Why use rod?

http://www.gripple.com/construction/product.php?prod_id=1

 

[zappy]

Thanks ito

Thanks ito

I never seen gripple before.Looks like a winner.

 

[electricalperson]

Why use rod?

http://www.gripple.com/construction/product.php?prod_id=1

but can that support a 600 pound transformer? i really dont like hanging heavy objects from celings but sometimes we have too

 

[George Stolz]

I try to be open minded, but the prospect of swinging a transformer on aircraft cable seems weird to me.

 

[jnsane84]

We've hung transformers from the ceiling before. It's not the preferred method but when youre adding additions to pre-existing equipment lines you have no choice. I believe the ones we hung were only 60 Kva and we used threaded rod with a chain safety at each corner.

 

[ITO]

Ceiling hung is SOP for a lot of jobs, and the #4 cable is rated at 495# each for a total of 1,980#.

 

[Cow]

I wish our supply house carried these so maybe I could try them out on a future job...

How does the price compare against threaded rod? They definitely look cheaper from a labor standpoint.

 

[kjw444]

We use this method all the time for lighting runs but never thought of using it for hanging transformers. I have used gripple before and that little key is a pain to use, for some reason it just doesn't want to unlock. There is another type of fastner out there with the buttons on the side to release the cable works much better but I can't remember the name. I almost want to say caddy makes them?

 

[Smart $]

... There is another type of fastner out there with the buttons on the side to release the cable works much better but I can't remember the name. I almost want to say caddy makes them?

http://www.erico.com/products.asp?folderID=218

 

[chris500]

These definitely look like something that I will try the next time I need threaded rod.