# At what angle do you cut banisters

 07.06.2012, 6:58 pmRalf27Posts: 2779Users I have a little geometric problem here. The following is given: A banister handrail is to be made. For this, the handrail must be cut to angles. All is well and good if two inclines in the room did not meet at right angles. How do I calculate the angle of intersection of the two pipes? I can get the length already, but not because of the angle for cutting and the twist required for cutting. I hope I was able to get across the problem in a way that was understandable. Or typed differently: the upper handrail has an incline of approx. 33 degrees, the lower one of 56. When viewed from above, both handrails run at right angles to one another. The "kink" cannot be done in 90 degrees. How can you best figure that out? I can also draw the imaginary center line in 2D, but since the whole thing is in 3D, I unfortunately get into a lurch. Grateful for any help. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 June 7th, 2012, 7:55 pmtick23Posts: 114Users @ Ralf27: what kind of profile shape is the handrail anyway? The easiest thing would be to let the railing run straight up and straighten out just before the bend ... because even with a pencil cut it will be almost impossible, depending on the profile shape, to get it 100% clean ... [This post was changed by zecke23 on 07.06.2012 at 19:56. ][- Answers - Quoting - Direct link -]
 07.06.2012, 8:02 pmRalf27Posts: 2779Users Sorry, you are right. The whole thing does not work with a square tube. It should be round pipe. The stairs are already there. Nothing more can be rebuilt there, but the handrail has to adapt to the stairs. Or a short piece is just not manageable in terms of design. -- http://www.alternativencomputerclub.de.vu [This post was changed by Ralf27 on 07.06.2012 at 20:03. ][- Answers - Quoting - Direct link -]
 June 7th, 2012, 9:43 pmThomasPosts: 7666Users @ Ralf27: Do the railings have to be brought together? Nobody will ever go into a corner with their hand anyway. My parents also have a staircase with a right-angled bend in the middle. The two railings (made of wood) are not together either, but stop about 5 cm before the (theoretical) meeting. -- Email: [email protected] Home: thomas-rapp.homepage.t-online.de/[- Answers - Quoting - Direct link -]
 June 8th, 2012, 11:05 amDrNOPPosts: 4118Users @ Ralf27: Is that still that railing? Have you just left it for two years and now try again? -- Signatures with more than two lines annoy me[- Answers - Quoting - Direct link -]
 June 8th, 2012, 8:17 pmRalf27Posts: 2779Users Quote:Original from DrNOP: @ Ralf27: Is that still that railing? Have you just left it for two years and now try again? No, it's not the same handrail. Is the following problem: So far I've been cutting and grinding my way to the result, but that's not really satisfactory. So, professionally! Especially when I have two handrails in the same way as described above, then I simply cannot calculate it correctly. Because if that were possible, then I could save myself a lot of work on the construction sites. PS: This is about stainless steel, mostly round tube 42.4. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 June 8th, 2012, 8:21 pmRalf27Posts: 2779Users Quote:Original from thomas: Do the railings have to be brought together? Nobody will ever go into a corner with their hand anyway. That is better, because the handrail usually sits on a railing and the whole thing is much more stable when the railing is connected to the handrails. "Unfortunately" it is usually the case that customers want a continuous handrail. The main thing here is to save me work on the construction site and to be able to do as much and precisely as possible in the workshop. About 2 years ago I wanted to solve the problem, but didn't really bite through, now I have an order where I have to connect a lot of handrails and on site that's a huge time problem. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 06/09/2012, 7:39 pmtick23Posts: 114Users don't you have a protractor on site that you can use? I did the math ... if I have now understood the course correctly, I get 116.8 ° every time. would be 58.4 ° when cutting ...[- Answers - Quoting - Direct link -]
 June 9th, 2012, 11:10 pminqPosts: 445Users Hm, what is that supposed to look like? The way I imagine it, two ellipses meet, which can never be brought congruent. Do you "fill" that with the weld? What about bending? You bend the part that you need (I also count kinking as bending here) and then weld it in between. greeting inq[- Answers - Quoting - Direct link -]
 06/09/2012, 11:20 pminqPosts: 445Users Icke again. Do that in a 3D program and then measure it with the functions you have there (or print out the views and measure it out analogously). Simply push two tubes together, it can't be that difficult ... inq[- Answers - Quoting - Direct link -]
 06/10/2012, 8:15 amtick23Posts: 114Users Quote:Original from inq: Hm, what is that supposed to look like? The way I imagine it, two ellipses meet, which can never be brought congruent. Do you "fill" that with the weld? What about bending? You bend the part that you need (I also count kinking as bending here) and then weld it in between. greeting inq the cut then has the shape of an ellipse, right ... You don't need to "fill" because the cut surface is the same ... bending would be a possibility. however, a 42.4 mm stainless steel round tube is used here. you cannot bend it so sharply without damaging it. the kink would then be a bow ...Quote:Original from inq: Icke again. Do that in a 3D program and then measure it with the functions that you have there (or print out the views and measure it out analogously). Simply push two tubes together, it can't be that difficult ... inq yes, a program is of great help here. the railing must have been designed by someone, according to which corresponding plans should / should be available ... you can also determine the angle with a simple triangle calculation ... In my opinion, the easiest / fastest would be to work with a protractor ... [This post was changed by zecke23 on June 10th, 2012 at 8:34 am. ][- Answers - Quoting - Direct link -]
 06/10/2012, 10:18 amhjoergPosts: 3794Users Practitioner: Digital spirit level Chop saw Measure the angle and twist, clamp in the same way in a chop saw (stainless steel blade) and weld. Pickling, passivation, polishing ... done. -- WinUAE fan hjörg Nethands "If I agree with you, we're both wrong" [This post was modified by hjoerg on June 10th, 2012 at 10:18 am. ][- Answers - Quoting - Direct link -]
 06/11/2012, 9:14 amRalf27Posts: 2779Users Quote:Original from inq: Hm, what is that supposed to look like? The way I imagine it, two ellipses meet, which can never be brought congruent. Do you "fill" that with the weld? What about bending? You bend the part that you need (I also count bending here, sometimes kinking) and then weld it in between. greeting inq Well, the cuts have to be made the same on both pipes, otherwise it really doesn't fit together. Only the twisting of the pipes is different. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 06/11/2012, 9:16 amRalf27Posts: 2779Users Quote:Original from inq: Icke again. Do that in a 3D program and then measure it with the functions you have there (or print out the views and measure it out analogously). Simply push two tubes together, it can't be that difficult ... inq It's good. In which 3D program? What could you take there? I can also simply push two pipes together in MaxonCinema (I haven't done it yet, so for this purpose), but I guess I won't get anywhere. Seriously now, that's harder than it looks later. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 06/11/2012, 9:23 amRalf27Posts: 2779Users Quote:Original from zecke23: yes, a program is of great help here. the railing must have been designed by someone, according to which corresponding plans must / should be available ... you can also determine the angle with a simple triangle calculation ... In my opinion, the easiest / fastest would be to work with a protractor ... Well, I would like to do that with a program, because unfortunately I get this problem again and again (rarely). Well, the railing is mine too. There are also plans for this, that's no problem. The only problem is that there is no plan for the handrail, because I want to do this. Only the handrail connects the individual railing parts and only through this connection there is a correct hold. That with the protractor on site at the construction site is a good idea, I've already tried that (on another project), but it turned out to be so that I worked on the angle, length and twist with the Angle grinder worked on. This is a long tinkering that costs time and unfortunately can lead to problems even with finished staircases (flying sparks, dirt, etc.) -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]
 06/11/2012, 9:29 amRalf27Posts: 2779Users Quote:Original from hjoerg: Practitioner: Digital spirit level Chop saw Measure the angle and twist, clamp in the same way in a chop saw (stainless steel blade) and weld. I have the tools for that, that's less of a problem.Quote:Pickling, passivation, polishing ... done. You have to be careful, because if you polish at the end you will damage the surface of the stainless steel again, or the protective surface will be damaged. If you still have a "fat finger" on it, then there can be problems. It can take a few days for the protective surface to form again without doing anything. There could be problems (seldom, really seldom), but unfortunately it has happened before. It is a long and interesting topic, but a different one. -- http://www.alternativencomputerclub.de.vu[- Answers - Quoting - Direct link -]