ksw
Member
- Location
- Selah, Washington
I was told that the NEC spells out the minimum length for unistrut if it is utilized as a method of support. I cannot find this specification. Is this true?
unistrut support length
- Thread starter ksw
- Start date
- Status
- Location
- Massachusetts
Re: unistrut support length
For us it all depends on the strut we chose.
5/8", 1 7/8" , 3" or Double strut. (2 - 1 7/8" struts riveted back to back from the factory)
It also depends on the load we have to carry, you can get load ratings from the manufactures.
I will be honest we exceed 5' quite often, many of the buildings we work have truss 6' apart or I beams closer to 10' apart.
All you will find in the NEC is something along the line of securely supported.
For us it all depends on the strut we chose.
5/8", 1 7/8" , 3" or Double strut. (2 - 1 7/8" struts riveted back to back from the factory)
It also depends on the load we have to carry, you can get load ratings from the manufactures.
I will be honest we exceed 5' quite often, many of the buildings we work have truss 6' apart or I beams closer to 10' apart.
All you will find in the NEC is something along the line of securely supported.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: unistrut support length
A catalog from a strut mfg will have information on the allowed loading. The span and load depends on the type of strut used.
A catalog from a strut mfg will have information on the allowed loading. The span and load depends on the type of strut used.
hbiss
EC, New York NEC: 2017
- Location
- Little Falls, New York NEC: 2017
- Occupation
- EC
Re: unistrut support length
No, nothing in the NEC even mentions strut systems.
Tom is correct, the manufacturer's catalog will have the information you require. Simply saying that the limit is 6 feet is totally meaningless because there are many different sizes and types of struts as well as support and construction methods.
Strut systems are used for a great many things, I've seen entire warehouses utilize this stuff for multi level storage.
-Hal
No, nothing in the NEC even mentions strut systems.
Tom is correct, the manufacturer's catalog will have the information you require. Simply saying that the limit is 6 feet is totally meaningless because there are many different sizes and types of struts as well as support and construction methods.
Strut systems are used for a great many things, I've seen entire warehouses utilize this stuff for multi level storage.
-Hal
- Location
- Massachusetts
Re: unistrut support length
As a kid I had a Go Cart made of strut.
Joints were welded, no spring nuts.
Dad was a plumber, you use what is available.
As a kid I had a Go Cart made of strut.
Joints were welded, no spring nuts.
Dad was a plumber, you use what is available.
- Status