1. Senior Member
Join Date
Sep 2011
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wisconsin
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213

## rolling offsets

is there a website you guys could give for formulas on figuring rolling offsets , now i am not talking about 3/4 pipe but doing this on 4 inch emt. making mistakes can be costly so I want to be able to figure it out and i cant measure it daignoly I have rise and how much over measurements. I cant seem to find a conduit bending section on this website there should be.

2. Senior Member
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Jan 2008
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Littleton, CO
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Just mark it out on the floor and wall with a pencil and measure.

3. Figure out what you need on a piece of 1/2" and transfer your results to your 4"

4. Senior Member
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Mar 2011
Location
Wisconsin
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Originally Posted by masterinbama
Figure out what you need on a piece of 1/2" and transfer your results to your 4"
+1 ! By far the easiest, least costly and most accurate method, especially for 4".

You could measure down an over then find the hypotenuse, but any mistakes in that method will cause a bad offset and require a calculator that does Sq. root. A piece of 1/2 emt can be tweaked to fit then either measure the offset or match it.

5. There is a way to do it with an old style wooden ruler but it can't be explained, it has to be visually demonstrated.

6. Senior Member
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Jun 2003
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NE (9.1 miles @5.07 Degrees from Winged Horses)
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Originally Posted by masterinbama
There is a way to do it with an old style wooden ruler but it can't be explained, it has to be visually demonstrated.
Let us know when you post the video. I was never trained in the method, but managed in a crude fashion.

Folding ruler, test light kit with seriesed lamps, and for the geek I was, a slide rule. I gave them up in reverse order.

7. Originally Posted by buddhakii
Just mark it out on the floor and wall with a pencil and measure.
That's the way I do it.

8. Senior Member
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Mar 2003
Location
Maryland
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I think the formula for rolling offsets is A sq + B sq = C sq rt

For instance 8" offset but need to roll 3" to left or right

8X8= 64 3X3=9
64+9 = 73
73 sq rt =8.544"

9. Senior Member
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Dec 2011
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Ocala, Florida, USA
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Originally Posted by tommy
I think the formula for rolling offsets is A sq + B sq = C sq rt

For instance 8" offset but need to roll 3" to left or right

8X8= 64 3X3=9
64+9 = 73
73 sq rt =8.544"
I have never calculated a rolling offset, but my spidey sense confirms your formula. Simple enough, since the rise (8") and the side slip (3") are two sides of a traingle with a right angle between and the desired length is the hypotenuse, then Pythagorean's theorum is correct.

10. Junior Member
Join Date
Nov 2006
Posts
4

## phone apps

search online for iphone apps...Master Bender \$3.99 willl do rolling offsets
android electrical wiring pro \$2.99
etc

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