Great video. Ot took me a while to find someone that explains things this well. So many useless videos that are 10+ mins and still couldnt explain this. Thank you 🙏
Thank you for taking the time to make this educated video for trades. I'm a plumber who didn't understand this for the longest time, but i now fully understand. I work and run cast iron and nothing looks so nice when you make beautiful offsets.
Can you share the formula for the 45* run lengths when doing a horizontal to vertical transition using 2x 45* fittings? The application would be to use this equal spread offset formula and also know the calculation for the 45* slope cuts of pipe when transitioning from horizontal to vertical. Thank you
Thank you for providing these videos, currently completed level 2 pipefitting and will be taking 3 and 4 this spring. This is a good basic refresher. Look forward to viewing all the other videos (especially on gas as 4th year we qualify for a "B" gas ticket) Any rigging and slinging videos, fire extinguisher classification, etc?
Hi Donald: thank you I'm glad this helped. I'm just trying to concentrate on math and science for now. Rigging, slinging and fire extinguishers might come in the future. What school are you attending?
What if its a 30 degree or any other degree? We're at a project where we're running (7) 4" inch rigid runs from a box, over to another box. We have a straight coming out of the box -a pre bent 90 - a 30 - a straight - a 30 - straight - 90 - then straight on the other end going into the conduit box. We're aiming for a 6" inch spread but all the measurements are off. The run from the 30 to the other 30 all the couplings are touching and closer together. We have all the straights coming out the box going to the 90, the same lengths. Thats where i think our issue starts.
Hello and thanks for the nice video. How about if they start equal and they finishi no equal. Ex. The start with 290mm center to center and they finish 260mm center to center. Thanks
Haciendo algo de trigonometria, obtuve la siguiente formula: Extension=spread x tan(@/2) Donde spread es la separación de centro a centro Y @ es el ángulo del offset, por eso si es 45 tan(45/2) es 0.414 Si es 30 tan(30/2) es 0.268
I enjoyed the training, but where is the formula 0.414 derived from? Okay, I looked back at the comments and found where you answered my question. What might be good to explain here is that the center point of the elbows are at 22.5 degrees, in relationship to each-other.
Hi William: 0.414 is a trigonometry number that is used when dealing with triangles with a 22.5 degree angle. Even though the fittings are 45 degrees there are 2 identical 22.5 angles created when the pipe turns. These two triangles are what form the trigonometry for the question. As it turns out the tangent of a 22.5 angle is 0.414 and this is the number we end up using in the formula. Although I didn't use trigonometry to sole the problem the number comes from trigonometry. Hope this helps and thanks for watching.
In theory yes, it should work for anything. I would give it a try first through. Sheet metal might have other variables involved that I'm not aware of.
I'm confused we just did this in class for a 45 and they say to multiply by 1.414 and for 22 1/2 then we multiply by .414 , I read an explanation you gave to someone else that two 45 would be considered 22 1/2 degree but what if you had two 22 1/2 and you wanted to know the offset
Hello: I'll try to answer that the best i can. When you have an equal spread offset using 45 degree fittings the change of direction (45 degree) ends up creating two identical triangles where it changes direction. As the change of direction is 45 degrees the two triangles formed each have a value of 22 1/2 degrees. We can use trigonometry to find the values in those triangles. The number 0.414 comes from trig and it defines the length of the opposite side of the triangle which has an identified angle of 22 1/2. That side is also known as the extension when it comes to equal spread offsets. The adjacent side is also known as the offset. In the end the extension is 0.414 times the length of the offset. I hope this helps and thanks for watching.
Hi Hans: The only other angle we generally work with in the piping industry is a 22 1/2 degree and there are different numbers for that. This is all based on trigonometry so your best bet is to either find some trigonometry tables or use your calculator to find the correct numbers to work with. Thanks for watching
Hi RidetoLive199: That works out to be a totally different scenario with different calculations. I might have to make a video about that situation. Thanks for watching
@@Lynchings Hello Hipster: Although there are constants which you can memorize and use in this situation, its best to learn trigonometry for most situations. I'm just going over the most common piping angle which is 45 degrees.
Hi Todor: The trigonometry numbers come from dealing with a 22.5 degree angle. Although the fittings themselves are 45 degrees when the piece of pipe changes direction the numbers are based on the fact that it creates two 22.5 degree triangles. Therefore when you are using trig its based off of that. Its a bit confusing as you would think its based off of a 45 degree but its actually not. Thanks for watching and I'm glad you liked the video.
Really liked your video but it falls a bit short in the complete picture of parallel offsets. As it only gives the example for 45° parallel offsets. That said I LOVE the quality of the video just wish you had gone more into the full formula to make people more versatile. This video is specifically only for a 45° bend. but if you wnet just wee bit more into the explanation of the formula this could have been all inclusive instruction. The formula for this is TANGENT ( 0.5 * Angle used) * Spread desired = Extension or in this case TAN(0.5 *45°) * 7" = 2.90" IF you use a different angle for example a 30° then the extension changes to 1.875" That formula, in that case, looks like this TAN(30° * 0.5) * 7" = 1.875" Make sure you are using Degrees and Not radians on your calculator
so why don't you follow thru our measuring tapes don't have decimals!!!! finish it ... 2.9= approx. 2-15/16" a real formula is ,. spread =Tangent 1/2 angle bent + spacing you want from center of conduit or pipes.
HI Ass ho: This video was simply to show how the formula worked to calculate the equal spread offset. Changing a decimal to a fraction can be found in another video is you need to calculate that. Take care
@@mikeyohanna1197 HI Mike: This one will not work for 90 degree angles. That would require a different calculation. Maybe I'll work on making another video for that. Take care.
Spread x Tan of 1/2 the angle. For 45 you use tangent of 22.5. For any other angle divide angle in half and use the Tangent for that degree. Example 60 degree turn use the Tangent of 30 degrees X spread to find the distance described in this video.
