Hanging conduit on pipe truss

[bertristerf150hd]

I am getting closer to wiring up my shop and i am looking for different ways of neatly hanging conduit from my pipe truss. I am looking at using ubolts and unistrut. Are there any other solutions? Thanks

 

[Steevo]

Will something like a beam clamp work?

http://www.grainger.com/Grainger/CADDY-Beam-Clamp-2KWY2?Pid=search

 

[StumpjumperDave]

check out www.erico.com the Caddy line

 

[frankush]

B-Line also makes stamped hangers, similar to Caddy and that stuff will run you alot less than strut.

 

[PRH44]

do have a pic of your truss?

 

[Alchymist]

These, with threaded rod between them- one around the pipe truss, one around the conduit:

 

[jbberns]

These, with threaded rod between them- one around the pipe truss, one around the conduit:

Don't think those are listed for conduit. I like strut and strut staps if there are a few pipes.

 

[Alchymist]

Don't think those are listed for conduit. I like strut and strut staps if there are a few pipes.

Is there something in the NEC prohibiting them? Seen them used in a number of places.

 

[PRH44]

You can use minerallacs (minnies)one for the truss and one for the conduit for single runs you use rod to drop down or bolt directly back to back for a tighter arrangement.

If you want to span two trusses you can use the minnerallac on each truss drop to rods and support a section of strut to run conduit on.

If you want to stay tight to the truss bolt the minnies directly to the strut.
minnies are cheap!
For a heavier duty expensive rack you can use double strut using a strut strap to the truss and then you can install conduit on top or bottom of the strut.

There are many sweet strut clamps to choose from just, have to pay the price. I prefer B-line brand. but Uni-strut or kindorf are fine products

 

[PRH44]

Is there something in the NEC prohibiting them? Seen them used in a number of places.

Nothing specific. NEC requires equipment to be used according to its UL listing. Depending on the manufacture and the clamps UL listing it may be fine.
Mechanically they are a fine product. Just not real popular in the electrical field.

 

[PRH44]

B-line, dottie, Appleton, and most electrical hardware manufactures make U- bolts they are more expensive than minnerallacs or a strut strap

 

[bertristerf150hd]

Thanks for the help guys, I will try to get some pics to try to help.

 

[bertristerf150hd]

Sent from my PC36100 using Tapatalk 2

 

[PRH44]

What is the distance between your trusses?

 

[bertristerf150hd]

I have never measured them. I will add that to my list. Probably 5 feet

 

[bertristerf150hd]

The truss average 5' on centers. I bought an old steam laundry in an old historic district, built in 1910. 12" thick concrete walls

 

[Bib Overalls]

I bought an old steam laundry in an old historic district, built in 1910. 12" thick concrete walls

You need to post some pictures in the Gallery sub-forum.

 

[PRH44]

5' is a good span for conduit and the like. Conduit requires support on 10 foot intervals. That is quite the truss system! You can run conduit/piping very easy with the right clamps.
Those old light reflectors are very cool also. Don't get rid of them (unless you want to give them to me) even if you install new lighting you can relocate and do some cool retro accent lighting with them.
What is the distance from finish floor to the bottom of your pipe truss?

 

[bertristerf150hd]

I thought that I had found something that would help install the unistrut easier, went down to my local electrical supply house and I cannot even get them in the USA.
If I remember correctly the truss are 14 feet above the slab.
I will be saving the old shades and be using them for something else.

 

[Fred43]

Hi brtiterf150hd,
I'm Fred43. Short Bio - 47 yrs in Elec Business From Apprts to Master / shop owner. 47years in Local 103 Boston. Have worked many pipe jobs with PVC, EMT, Steel conduit.

I would suggest that you use strut and strut clips if you have parallel runs. Hang the North to South at a different elevation than the East to West. Five foot spans are ideal.
Minnies and rod make for easy height adjustments. Also you can put the pipe up with one person if need be as it will rest on top of the strut. It comes down to cost of materials versus cost of labor.

Those round clamps need the rod cut perfectly or you are up and down the ladder. They are loose so that plumbing pipes can move like PVC clamps do.