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#50121 - 03/23/05 08:33 PM Eying offsets?  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
I was wondering if other electricians acually use formulas or the multipliers when bending offsets when using 1/2" or 3/4". Or do you just eye it?


Jesus may have been a capenter,but God was an electrician.Genesis1:3

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#50122 - 03/23/05 08:39 PM Re: Eying offsets?  
CTwireman  Offline
Member
Joined: Feb 2002
Posts: 840
Connecticut, USA
A single "quickie" offset can be done by eye.

However, multiple, lined up, in-and-out, etc offsets should be done with the measurements and formulas.

Peter


Peter

#50123 - 03/23/05 09:03 PM Re: Eying offsets?  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
[schwartzenegger]You must vuse de formulars![schwartzenegger]

If its one pipe by itself, I'll eye-ball it. Thumb and feel.

If its 30 next to each other, I use the multipliers, and a magnetic protactor, levels, calculator, chalk-line, lasers of varying types, and a fresh jolt of coffee.

I just got done with a job doing about 20,000'+ of 1/2" and 3/4", all exposed for an Arch's office. If I saw anyone eye-balling I'd throw a fit, if not an object. I had under 10% waste, not bad considering, the amount that actually got bent. 50%


Mark Heller
"Well - I oughta....." -Jackie Gleason

#50124 - 03/23/05 09:04 PM Re: Eying offsets?  
Active 1  Offline
Member
Joined: Feb 2003
Posts: 687
Grayslake IL, USA
Small offsets I just do without thinking. Otherwise I will use formulas unless it's in bad working conditions.

Tom


#50125 - 03/23/05 09:11 PM Re: Eying offsets?  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
I use the formulas also on larger and repetitive bends.

We are not taking rocket science here, an offset made of two 15 degree bends has 4 as the multiplier an offset made of two 30 degree bends has a 2 as a multiplier, either are easily done in your head.

A multiplier of 1.4 works well for 45 degree offsets.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#50126 - 03/23/05 10:21 PM Re: Eying offsets?  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,057
Estero,Fl,usa
One of the conduit bending sites had a great trick. A standard hickey is 30 degrees with the handle straight up so you use 30s for your offset and the magic number is 2.
So if I want a 2" offset I put the marks on the pipe 4" apart and line it up to the first mark on the hickey, bend them until the handle is straight up.


Greg Fretwell

#50127 - 03/24/05 12:52 AM Re: Eying offsets?  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
A 30 in a single shot with a hicky is a little too tight. IMO

"Straight up" only depends on what you're bending against. All those benders with levels in them make me laugh, find a level floor first.

Site line benders work well, but you can't move your head, or its useless. Hard to do if you need to put your body into 3/4 or larger.

And whats with this.... Some benders are 30 straight up, and some are 45 straight up.

Anyway, I think there needs to be a better bender, and I have some ideas...


Mark Heller
"Well - I oughta....." -Jackie Gleason


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