One hole straps, up or down?

[Rewire]

They can go either way. Depends on if you're running one or if multiple which one is going up first how close they are etc etc etc



They have these crazy inventions called magnets that they've started attaching to levels that allow you to put it on either side of your pipe.

I have lost several Klien levels due to a twenty foot drop to the concrete because of trhe cheapo magnets they use. I have an expensive earth magnet level but old habits are not easily broken.

 

[William1978]

I install mine under.

 

[nakulak]

Look at any pipe run in any existing commercial/industrial building, were EMT
is strapped with one-hole straps. You will find more EMT pulled off the wall
were the one-holes are on bottom compared to the one holes on top.

I can do pull ups on EMT supported with one-hole straps on top of the pipe
and the EMT will still hug the wall.

I was wondering if I was the only one thinking that. I looked up to see if I could find any manufacturer's instructions for that reason but haven't found any. Anyway, for the above reason I try to always put them on correctly.

 

[Kdog76]

Look at any pipe run in any existing commercial/industrial building, were EMT
is strapped with one-hole straps. You will find more EMT pulled off the wall
were the one-holes are on bottom compared to the one holes on top.

I can do pull ups on EMT supported with one-hole straps on top of the pipe
and the EMT will still hug the wall.

I guess that's why I was trained to do so also... Other employers who came after made put the strap with the hole on the bottom. Now that I'm my own boss I'm really confused which way to go .

 

[daleuger]

I have lost several Klien levels due to a twenty foot drop to the concrete because of trhe cheapo magnets they use. I have an expensive earth magnet level but old habits are not easily broken.

Right on. I owned one Klein level then after that no more. I don't care much for their channel locks either. Most everything else they're good to go.

 

[growler]

Look at any pipe run in any existing commercial/industrial building, were EMT
is strapped with one-hole straps. You will find more EMT pulled off the wall
were the one-holes are on bottom compared to the one holes on top.

I can do pull ups on EMT supported with one-hole straps on top of the pipe
and the EMT will still hug the wall.

This is true. I was taught this by my helper in 1989. He had been in the trade for many years and never done anything but run conduit but he was really good at it. This one guy taught me many tricks of the trade that I hadn't considered before.

You are not that likely to see anyone pushing up on conduit but there is always the chance of someone pushing down on it. With the hole at the top you are covered 99% of the time.

 

[e57]

What about mineralac, K8 and strut using fools like myself?


Although I have been known to alternate them solely to make space for other straps - it is not absolute, whatever looks like it supports the conduit withing applicable support rules. That said I do like to have some uniformity on the exposed stuff.

I can do pull ups on EMT supported with one-hole straps on top of the pipe
and the EMT will still hug the wall.

Sure if you're using maluable iron backed straps it wouldn't matter which way you hang them....

 

[daleuger]

Karl and Growler may be right (not agreeing or disagreeing) but I was also among those taught to put the screw on the bottom. Not that I always do now. Reason being that the open side of the strap on the bottom it is more likely just to bend the strap open and let the pipe go if somebody grabbed it or pushed down on it, leaving a strap hanging up there holding no conduit.

 

[peter d]

I have never, ever even thought about this until someone once told me "You put the straps in upside down." I was like: :-?:-? He then gave me a line of reasoning about why they should go a certain direction. I thought it was bogus and I still don't think it makes a difference.

 

[charlietuna]

On odd days we put them up and even days we put them down--that way we know what day they were installed....

 

[daleuger]

What about if you're running vertical, hole on the left or right? Rut-roh!!!

 

[Mr.Sparkle]

What about if you're running vertical, hole on the left or right? Rut-roh!!!

Now you've done it, that's it I can't handle it anymore. I am changing professions.

 

[Fulthrotl]

Sorry Gus! I slipped and mentioned it!!

mentioned what?

 

[tkb]

If you let go of it, and it does not fall, is it supported??? :-?

 

[quogueelectric]

In 1984 I watched a movie from the mfg which specifically stated to install with the holes upwards. That was the way they were designed to be used. I have done it that way eversince much to the displeasure of many who did not view the film. They are designed to hang the pipe and when weight is placed on the pipe in this fasion it does not pry the strap off the wall loosening the strap. Ok I have my Kevlar underwear on now.

 

[220/221]

Well....you asked if the hole goes over or under but the poll says up or down so I was confused.

Logic dictates that you put the screw under. We have all seen conduit popped out of a bent strap

What about if you're running vertical, hole on the left or right? Rut-roh!!!

That's when you alternate

 

[iwire]

Well....you asked if the hole goes over or under but the poll says up or down so I was confused.

I added the poll and used the words that Mr. Wizard use the title of this thread.

Logic dictates that you put the screw under. We have all seen conduit popped out of a bent strap

OK then, case closed, we can all go home.

 

[K8MHZ]

In Jiffy's nomenclature their straps are drawn as to be installed with the screw on the bottom:

http://www.minerallac.com/PDF's/Traditional/One Hole Straps.pdf

However, it is my understanding that one hole straps are designed as hangars and as such should be installed with the tab on top.

This topic has got me interested as whether or not one hole straps are listed for use on ceilings, no matter what the material they are made of.

There is not a plethora of info on this topic on the 'Net for some reason.

 

[iwire]

I edited the poll wording.

 

[jeremysterling]

I heard this logic of screw above pipe last year and agree with it. I did some surface mount EMT at ~12" AFF on a block wall in a school where a child might use it to step up. I applied the screw up logic and installed accordingly.