Your videos have made things so much easier for me, 8've been in the roofing business for 44 years and now live in an area of the country where along of things aren't readily available so I end up making a lot of stuff myself. Thanks much for the help. Mark Mackey Roofing LLC Serving Northern Wyoming
Great information, thank you for making the videos on this topic. I'm a roofing foreman, hobby fabricator with an interest in pipe fitting. I've studied the trigonometry books and understand the formulas but your simple break down of template making has saved me some time on my shop projects.
My God man you have easily open my eyes to doing simple layouts! I work at Tampa Metal Works and I do most of all the layouts and I've got to say, you sir are the bees knees! I've watched every video you put out and I have to say my sheetmetal game has gone insanely off the charts! Thanks for putting these videos out! You da' man!!
Very informative video. Being a metal roofer , I have been searching for some time now for an simplistic way to lay out a cone to suit the pitch angle of a roof. Thank you so much for sharing. Will give it a go on the next one...
Thank you so much for this video!! As a cosplay channel, this has been very helpful for me because I have to make pieces from time to time that are truncated cones.
I'm having trouble wrapping my head around how point 4 (in the middle of the diagram) is correct when it doesn't seem to take into account the slant of the cone. if there was a very low pitch and the difference between the top and bottom was large, say 10 to 2, the middle point would be close to the cone height, where it should be close to the first point.
thank you. i have autocad but flattening sheetmetal isn't very easy to do. with 3D models. and cones are pain for me. specially when cone has to fit on top of of pitch roof . but watching your video and drawing 2D in cad same way you did allow me to figure out flat pattern. plus i love to do things old school so i can understand how things work
Dave, when properly laid out each developed line should touch the flat table, without rocking. Lines 1 & 7 are true as drawn, all other true lengths are developed by projecting points at the miter line to 1or7 at a right angle from center line. Swing arcs from apex adjusted to the new developed positions on line 1or7. When complete all points on the miter line will touch the table.
I dont mean to be off topic but does anyone know a method to log back into an instagram account..? I stupidly lost the login password. I would love any tips you can give me.
@Emanuel Aydin Thanks for your reply. I got to the site through google and Im trying it out atm. Looks like it's gonna take a while so I will get back to you later with my results.
the the arbitray angle you drew thats the roof pitch ? so lets say i was gonna go a trunk cone for a 12/12 pitch then are angle would of bin a 45deg angle ? very cool video by the way
the bottom angle would be the pitch, a 12/12, yes, a 45. This method is typically used for making custom roof jacks not available for say the typical 4/12,as in a steep pitched roof. I used to build custom exhaust systems for motorcycles and used this method for making transition pieces snaking thru and contouring along the bike....
Correction on making the true length reference points www.sheetmetalworld.com/sheet-metal-news/fabrication-tutorials/22-sheet-metal-tutorials/5960-developing-a-pattern-for-a-cone-with-a-pitch-using-radial-line-development
either your memory is failing, you got in a hurry and made a mistake not using the true lengths of the lines, or whatever. you must project each line ,other than the profile edge lines,which are already in their true length,paralell to the base until they intersect either profile line. then they are in their true length.
Robert Unversaw ... no need to post a new video... to demonstrate the mistake, use this same method on a 0/12 pitch(flat roof).... your line lengths will be different, yet we know that’s not the case on a flat roof..... the wider you are where the jack hits the roof, the more drastic the problem will be....
@@philipdahlquist2553 right. I'm just pointing out that everyone has a critique to offer but won't include a resource or video for someone new like me to learn the method correctly. I've found the resources luckily and maybe I'll upload a video at some point...
Robert Unversaw .... as far as roofing applications go, the way this was shown would work “good enough” for 99 % of my customers.... the only thing I would want from my shop workers, is to make sure they know that they are cutting corners.... I learned my layout in a shop that used 1/4 and 3/8 plate to make fittings, so these other steps are important to know, even if not always necessary when working with lighter metals for roofing parts ( storm collars will cover up any shortcuts usually)
hi in transforming the lengths on the side of cone to the papers next to it , you must obtain the the true length of every line you drown wich you did not it is totally wrong and not going to fit . so please correct this video or remove it of youtub as as some beginners my do big mistake by following your this example .
Absolutely agree, unfortunately this is misleading. As you correctly say Sam the true lengths must be found. The only lengths that you can take in the way shown are the two outside lengths they will always be true as they are not sloping away from you in the elevation. All the other lengths as you picture the cone drawn, are actually sloping away so just taking those lengths from the Apex will not give you the correct length. Where you bring your points from the base line up to the apex and they cross your bottom truncation you must take your points out to one of the sides of the cone. doing this will give you the true length of that point. Plot those points in the same way as described. I agree with the rest of your video Dave.
I have a roof flange to make with a 10_5/8" pipe on top and a 2° slope on bottom- for runoff. I've watched this video SEVERAL times over a few days now and None of my templates work. I just checked the comments here, to see if their was anyone else with similar issues. Seems like Almost Every Comment, is telling that it doesn't work. It would be nice to search for something Useful and find a true video about the subject!!!
Is there a way to lay this out without finding the apex of the cone? I'm sure that i have seen it done before by using the radius arch at the top and bottom using the side view but can't remember the process. Some of the parts i have to make put the apex far outside my work surface.
