358.30a exception 1 emt support

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klineelectric

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FL
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electrical contractor
I am wiring a metal building (garage). Vertical 2"x2" metal stud truss system spaced at 5'. I plan on mounting 4"x4" boxes (recepts) every other stud @ 4' from floor with emt horizontal from box to box with 1 strap on the center stud. This places the support within 5' of each box. In the code book I read this as acceptable, but than I read the handbook and their examples are saying on roof or ceiling supports. Am I correct with code book interpretation?
 
I think you're good. 358.30(A) exception 1 makes no mention as to whether it's ceiling or wall


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Thanks, that's what I thought. The code is pretty clear but the handbook got me with their example. Should have known better ,but its always great to have other opinions.
 
Cow said:
These work pretty good too, if you do need a strap to meet code.

http://www.erico.com/catalog/parts/812MB18A?pdf=1

We sandwich them behind the box. I use them a lot doing lighting in tilt ups with steel trusses.
Click to expand...

We use these a lot in this exact application. I use the mounting clips that pound onto the steel truss and have the 1/4" stud through the bracket and the box. I then install tek screws from inside the box to make it even more secure.
 
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