Support for EMT Boxes on Metal Studs

[69_sportsroof]

Hello all, I thought I was going to save myself a lot of time but now I'm wondering if this violates the support rules. I mounted boxes on the studs of my garage, and was going to run emt box to box. The only issue is the closest support will be 4ft from the boxes without me rigging up some struts or something. The boxes are over 8 feet off the ground and the studs are 4ft on center. Thoughts?

 

[Stuart in MN]

I believe you will be okay. This is from the 2008 NEC, but I don't think anything has changed.

358.30 Securing and Supporting.
EMT shall be installed as a complete system in accordance with 300.18 and shall be securely fastened in place and supported in accordance with 358.30(A) and (B) or permitted to be unsupported in accordance with 358.30(C).
(A) Securely Fastened. EMT shall be securely fastened in place at least every 3 m (10 ft). In addition, each EMT run between termination points shall be securely fastened within 900 mm (3 ft) of each outlet box, junction box, device box, cabinet, conduit body, or other tubing termination.
Exception No. 1: Fastening of unbroken lengths shall be permitted to be increased to a distance of 1.5 m (5 ft) where structural members do not readily permit fastening within 900 mm (3 ft).
Exception No. 2: For concealed work in finished buildings or prefinished wall panels where such securing is impracticable, unbroken lengths (without coupling) of EMT shall be permitted to be fished.

 

[69_sportsroof]

Thanks for the quote, I'll use that if the inspector gives me any grief over it. The alternative is a ton more work...

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[ard]

You are going to bend offsets so that run isnt way out, yes?

 

[69_sportsroof]

Yeah, box offsets so it sits flush on the support in the center. There are ten boxes and outlet combos so I was just was worried I'd have to rig up unistrut for all of them

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[prostreetamx]

We ran into this issue updating a lot of 4s boxes that were literally floating in the air with no supports and no straps anywhere for the conduit either. They make several special brackets that you can mount to the wall under your current box that extend out each side to support your pipe runs. They even make round ones that will allow entry on all sides. We called them pie plates but I'm sure they have an official name that I can't recall. You can use some flat steel and mini straps to make your own supports. The brackets we used were set up for mini style straps already.
https://goo.gl/images/6DmY8p
This style would use 1 hole straps.

 

[cory58]

My new garage passed inspection with runs just like your photo (metal studs 4' o.c.).


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