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Old 08-08-2019, 11:57 AM   #1
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Default Stapling over joist for trusses ?

In a farmers shop and am running wire for some lights and I asked my boss if I could go over the joists if I wanted to. I didn't and went elsewhere anyway, but he said you can't staple to the top of joists. I didn't really see anything in the code that prohibits it because the spacing is less than 1.5 metres. Is he right? Other than its ugly as hell?
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Old 08-08-2019, 12:01 PM   #2
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Those don't look like Joist to me.......
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Old 08-08-2019, 12:17 PM   #3
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How about rafters or trusses?
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Old 08-08-2019, 02:11 PM   #4
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Quote:
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Those don't look like Joist to me.......
They are when the roof is on the west wall.. lol
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Old 08-08-2019, 02:25 PM   #5
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12-514 Protection on joists and rafters (see Appendix G) Cables shall not be run on or across
(a) the upper faces of ceiling joists or the lower faces of rafters in attic or roof spaces, where the vertical distance
between the joists and the rafters exceeds 1 m;
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Old 08-08-2019, 02:57 PM   #6
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Commonly called the three foot rule
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Old 08-08-2019, 03:01 PM   #7
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If that runner board that goes from end to end is 2x4 you could have stapled to the side of that.. Sides alright, on top where you can walk/ crawl is not.
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Old 08-08-2019, 03:06 PM   #8
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Not sure if it's allowed up there, but down here we would just staple the cables to one of those diagonal web cords.
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Old 08-08-2019, 03:29 PM   #9
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FYI......Every state is a little different but Farmers and agricultural companies have exceptions from following alot of building codes. I'm sure stapling above the joist is fine in a farm building.


oops i didn't realize you are in canada...dont know if there are any exceptions there

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Old 08-08-2019, 04:04 PM   #10
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I know I need to have a clearance of 3 feet between the roof and the tie beam/joist/whatever and a support of 1.5 metres between them horizontally. If both these conditions are met, which can easily be done in the example in the picture, then it should be fine shouldn't it? And yes it's Canada so CEC rules but I didn't see anything that wouldn't allow it.
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Old 08-08-2019, 05:26 PM   #11
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You answered your own question. Yes it is allowed. Stay under the 3 foot rule
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Old 08-09-2019, 10:26 PM   #12
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The other thing is you actually have to staple them too. Because laying on the truss / rafter is not considered support and since it is not fished, you are required to staple it.

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Old 08-10-2019, 05:03 PM   #13
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The other thing is you actually have to staple them too. Because laying on the truss / rafter is not considered support and since it is not fished, you are required to staple it.

Cheers
John
It's not considered supported? Can you point me to the rule that says that? I guess it's because it can still sway sideways.
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Old 08-10-2019, 05:15 PM   #14
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Quote:
Originally Posted by Funkadelicfred View Post
It's not considered supported? Can you point me to the rule that says that? I guess it's because it can still sway sideways.
Down here it would be support, but not secured.
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Old 08-10-2019, 07:42 PM   #15
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Quote:
Originally Posted by Funkadelicfred View Post
It's not considered supported? Can you point me to the rule that says that? I guess it's because it can still sway sideways.
It is the same rule as the regular stapling rule...

Cheers
John
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Old 08-10-2019, 10:11 PM   #16
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12-510 1 and 2, but for some reason my phone will not let me copy from the code book right now.
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Old 08-11-2019, 07:39 AM   #17
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Here you go...

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12-510 Running of cable between boxes and fittings (see Appendices B and G)
Δ 1) Where the cable is run between boxes and fittings, it shall be supported by straps, Type 2S or 21S cable ties, or other devices located
a) within 300 mm of every box or fitting; and
b) at intervals of not more than 1.5 m throughout the run.

2) Cables run through holes in joists or studs shall be considered to be supported.

3) Notwithstanding Subrules 1) and 2), where the cable is run as concealed wiring such that it is impracticable to support it, and where metal sheeting or cladding, metal joists, metal top or bottom plates, or metal studs are not used, the cable shall be permitted to be fished and need not be supported between boxes and fittings.

Δ 4) Notwithstanding Subrule 1) a), where cable is run to a switch or a receptacle with an integral enclosure incorporating an integral cable clamp, the cable shall be supported by straps, Type 2S or 21S cable ties, or other devices located within 300 mm of the switch or receptacle wall opening, and there shall be at least a 300 mm loop of unbroken cable or 150 mm of a cable end available on the interior side of the finished wall to permit replacement.
Cheers
John
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Old Today, 08:36 AM   #18
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Quote:
Originally Posted by Funkadelicfred View Post
In a farmers shop and am running wire for some lights and I asked my boss if I could go over the joists if I wanted to. I didn't and went elsewhere anyway, but he said you can't staple to the top of joists. I didn't really see anything in the code that prohibits it because the spacing is less than 1.5 metres. Is he right? Other than its ugly as hell?
I know you said it’s a farmers shop, but will there be any livestock in there?
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Old Today, 08:41 AM   #19
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Down here it would be support, but not secured.

In an install like that (technically attic space) have you ever been told it needs a running board along side it?
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