Then after you get the 22.36 you would then have to remove the measurement of the 2 45s correct? To get the actual piece of pipe. I’m teaching some of my apprentices here and I’m brushing up on my formulas.
What if you have an inside corner where you would typically use a 90, but there's a complication in the corner. There's a vertical pipe, 6" in diameter, and you also have to rise 6" on the adjacent wall to get above a locker shelf--all in just two bends? This is a real problem I've puzzled over. I can sometimes do it by the eyeball method but it doesn't come out quite the way I hope because I don't swivel the pipe for the second bend quite right.
Wow. That sounds like a bit of a tricky situation. In all fairness I'd have to see what is going on in the room to even have a chance to figure it out. Thanks for watching.
@@tradestutor1191 , Thanks for the reply. I admit, my description here was slightly hypothetical, but it tried to get at the problem I'm describing. In other words, the numbers do not matter too much; use any dimensions for the rise of the shelf and the diameter of the cylinder that are convenient. What I'm looking for is a solution to a shape very similar to the one you used, except the end of the pipe at the bottom left would be coming out of the page/screen along the corner of the wall and floor toward you. So, it's a rolling 45-45, I think. Since it is rolling (climbing), the hypotenuse grows. Looking from the top down, it would look just like a 45-45. But when trying to bend it, what is the degree I need to swivel the conduit in the bender out of the regular plane of the legs of the first bend to get it to come out right? Is it 45-degrees? I came up with this problem when trying to bend this shape to fit along the center-lines of two I-beams at 90-degrees to one another where the end of one is resting on the other at their corner. The lips prevented me from doing a kicked 90. Thanks again for answering. I really like how you simplified the math using two triangles.
The green triangle is entirely unnecessary. Once you have the blue triangle’s hypotenuse figured out, you just multiply that by the cosecant of the bend angle to get the distance between bends. That’s it
nice video sir.... Sir what if 22.5 degree roll..? what would be the run..?.and.can you also tell us sir the formula for for travel if it is 22.5 degree roll..thank you so much... and good luck...
It's the same up to the point that he uses "C*1.1414" Yours would be: Travel = C/cos(67.5) or C/sin(22.5) both equal C/0.3827 Making the travel in this example 41.31 instead of 22.36 The bottom angle of your green triangle would be 22.5 and the top angle is 67.5 (90-22.5)
@@RB-xv4si Bud, I said Travel = C/0.3827 I bet you find that equals about the same as Travel = C*2.613 Good job discovering trigonometric identities though ;)
@@RB-xv4si Are you ok? Do you have dementia? Do we need to call someone? How many ways do I have to say csc(22.5) equals 1/sin(22.5) for a smooth brain to understand? Most scientific calculators don't even have a [sec], [csc], or [cot] function, because trig identities are so commonly known. This conversation has been like me saying "turn 90° right" and then you saying, a year later, "nah, that's wrong, it's 270° left." I would assume you're a troll, but it's not like you're getting a lot of attention semantically arguing about trigonometry. Hope you get the help you need.
What I've noticed....it's super easy for you to lay this out by mathematics, and/or on paper, but when it comes to an actual (physical) example, there are none. Lmao
@@RB-xv4siyou ALREADY KNOW.. the examples are ALWAYS cartoons. And you might feel that "it's the same". But try a rolling offset that's VERTICAL In some cramped space..it's "the same" right? But that becomes a different beast in an actual boiler room or something.. or if you really don't have a nice wall to mark from..because the crap is hanging in mid air in a giant building. And no, your tape measure is NOT going to reach a surface in those scenarios..
@@mebrn5337 that’s a great observation; doing the math right doesn’t matter if you don’t have the right measurement to begin with. And part of being a good electrician is figuring out how to get the right measurement. Sometimes that involves using a line laser or a plumb bob. It also sometimes helps to realize that this job isn’t for everyone.
@@RB-xv4si apparently, you work in a place where people will let you take all that time to get the laser or getting a plumb bob. Most bosses would yell at you, that youre taking too long.
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2 1/2 years in & you made this more clear than some of the 20 year hands I’ve asked, thank you
You're welcome. I'm glad it worked for you. Take care.
Perks of going union. Anyone you ask will know the answer.
I’m a 2nd year apprentice and I run into mechanics of 20-30 years that can’t grasp the concept
Thanks for the videos, very well made. Need more of them!!
Please do this in a real world setting. I would love to see this in action.
This guy knows Steve! Steve changed my life
More tutors please about piping..thanks..great video!!
Thank you. I'm glad you enjoyed it.
Hi, I like your video. Thanks
How do you figure out the rolling offset of a fitting? Got a 90 degree fitting, that I'm rolling on a 45 that I need the offset for.
Competing in the ua national apprenticeship contest today. This was a great refresher
I used to teach for the UA and I've been to that apprenticeship competition a couple of times. it was a lot of fun. Good luck and thanks for watching!
Nice comprehensive video. Could you possibly do a video on how to calculate and cut down 90 degree butt-weld pipe elbow's? That would be awesome!
T TY
Throw is equal to OD x 1.5 subtract throw and weld gap from total offset
Thnx for making it easy
Very helpful thnx!
That was really helpful
Glad you liked it. Thanks for watching.
When would i be using this formula when a degree of roll isn't specified? Or just when trying to get from a to b??
Then after you get the 22.36 you would then have to remove the measurement of the 2 45s correct? To get the actual piece of pipe. I’m teaching some of my apprentices here and I’m brushing up on my formulas.
Hi Caesar: Yes, that is correct. You would have to subtract the fitting allowance for each of the two 45's. Thanks for watching.
Beautiful
Thank you. I'm glad you enjoyed it. Have a great day.
Can you do a video on the ideal gas law and pascals law?
Can you do a video on special offsets?
What if you have an inside corner where you would typically use a 90, but there's a complication in the corner. There's a vertical pipe, 6" in diameter, and you also have to rise 6" on the adjacent wall to get above a locker shelf--all in just two bends? This is a real problem I've puzzled over. I can sometimes do it by the eyeball method but it doesn't come out quite the way I hope because I don't swivel the pipe for the second bend quite right.
Wow. That sounds like a bit of a tricky situation. In all fairness I'd have to see what is going on in the room to even have a chance to figure it out. Thanks for watching.
@@tradestutor1191 , Thanks for the reply. I admit, my description here was slightly hypothetical, but it tried to get at the problem I'm describing. In other words, the numbers do not matter too much; use any dimensions for the rise of the shelf and the diameter of the cylinder that are convenient. What I'm looking for is a solution to a shape very similar to the one you used, except the end of the pipe at the bottom left would be coming out of the page/screen along the corner of the wall and floor toward you. So, it's a rolling 45-45, I think. Since it is rolling (climbing), the hypotenuse grows. Looking from the top down, it would look just like a 45-45. But when trying to bend it, what is the degree I need to swivel the conduit in the bender out of the regular plane of the legs of the first bend to get it to come out right? Is it 45-degrees? I came up with this problem when trying to bend this shape to fit along the center-lines of two I-beams at 90-degrees to one another where the end of one is resting on the other at their corner. The lips prevented me from doing a kicked 90. Thanks again for answering. I really like how you simplified the math using two triangles.
So the offset is the horizontal distance and the rise is the vertical distance?
Thanks u..
You're welcome. Thanks for watching
The green triangle is entirely unnecessary. Once you have the blue triangle’s hypotenuse figured out, you just multiply that by the cosecant of the bend angle to get the distance between bends. That’s it
Does this work on 90 rolled offsets?
Not quite so. But you can stop after calculating for "c" and use that as the travel.
How did you get 15’-1” out of 250 squared??
15.81' or 15' 9 3/4"
square root, not squared
I'm waiting on that same answer
Something they teach the apprentices at the Plumbers Local Union 777, 🧐.
nice video sir.... Sir what if 22.5 degree roll..? what would be the run..?.and.can you also tell us sir the formula for for travel if it is 22.5 degree roll..thank you so much... and good luck...
It's the same up to the point that he uses "C*1.1414"
Yours would be:
Travel = C/cos(67.5) or C/sin(22.5) both equal C/0.3827
Making the travel in this example 41.31 instead of 22.36
The bottom angle of your green triangle would be 22.5 and the top angle is 67.5 (90-22.5)
@@RB-xv4si Bud, I said Travel = C/0.3827
I bet you find that equals about the same as Travel = C*2.613
Good job discovering trigonometric identities though ;)
@@RB-xv4si Who said anything about tangent? cosecant is identical to one over sine. It's math.
@@RB-xv4si Are you ok? Do you have dementia? Do we need to call someone? How many ways do I have to say csc(22.5) equals 1/sin(22.5) for a smooth brain to understand? Most scientific calculators don't even have a [sec], [csc], or [cot] function, because trig identities are so commonly known.
This conversation has been like me saying "turn 90° right" and then you saying, a year later, "nah, that's wrong, it's 270° left." I would assume you're a troll, but it's not like you're getting a lot of attention semantically arguing about trigonometry.
Hope you get the help you need.
What I've noticed....it's super easy for you to lay this out by mathematics, and/or on paper, but when it comes to an actual (physical) example, there are none. Lmao
Wtf are you even trying to say?
@@RB-xv4siyou ALREADY KNOW.. the examples are ALWAYS cartoons. And you might feel that "it's the same". But try a rolling offset that's VERTICAL In some cramped space..it's "the same" right? But that becomes a different beast in an actual boiler room or something.. or if you really don't have a nice wall to mark from..because the crap is hanging in mid air in a giant building. And no, your tape measure is NOT going to reach a surface in those scenarios..
@@mebrn5337 that’s a great observation; doing the math right doesn’t matter if you don’t have the right measurement to begin with. And part of being a good electrician is figuring out how to get the right measurement. Sometimes that involves using a line laser or a plumb bob. It also sometimes helps to realize that this job isn’t for everyone.
@@RB-xv4si apparently, you work in a place where people will let you take all that time to get the laser or getting a plumb bob. Most bosses would yell at you, that youre taking too long.
@@mebrn5337 sounds like a personal problem.
I thought the offset and rise had to be the same because it's a square.
Hi Jose: Sometimes that is the case but in this situation its not. Take care and thanks for watching.
Don’t forget to take off for fittings and weld gaps 😊
You bet. You can check out my video on fitting allowance to help with that. Thanks for watching.
Skip weld gap, always end up short. Just the fittings. If anything, allow for half the gap, just 1 fitting. Pipefitter trick!
While you're trying to do this math, the boss is yelling at you, as to why you're taking so long..that's the reality
Are you gonna spend 20 minutes to measure all this? There’s gotta be a faster way.
Sir ecentric saddle ka layout kernay ka trika bata dain
That was such a difficult way to explain it….. It’s really not that difficult.
So at the starting point is the 45 degree fitting also rolled at a 45 degree angle?