Cutting square tubing to install “on the diamond”

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Starting a BIG fence project this week out of square tubing.  Using 4” x 11 ga square for the posts and 2 1/2” x 14 ga for the rails.  The rails will be set on the diamond (faces at 45 degrees to vertical).  I’ve seen some fences built like this, but the rails are set level and changes in elevation are handled by stair-stepping the rails at each post.  We want to have rails rails flow with the ground.  Some of them will then be angled and need the ends cut at an angle to meet the post faces.  I’m thinking we will cut with a portaband, but need to figure out how to mark these angled ends “on the diamond”. Any suggestions?Sent from my iPhone using Tapatalk
Reply:Curve-o-mark should do it. Kinda spendy but will pay for itself if you are cutting many different angles.Miller Multimatic 220ACMiller Thunderbolt 225Victor OA
Reply:Don't know if a curve-o-mark works on square tube but the corners of the tube are 90 deg's. I think a simple bevel tool would get you the other angles you need. Maybe use a string line between the posts to set the bevel. https://www.google.ca/search?source=...w=1152&bih=607
Reply:Structural steel by design. Only used on I-Beam myself and of course pipe. Welder Dave is spot on with using string line and the adjustable bevel. I was thinking about transferring the measured angle to the "diamond" rail. Probably a simple technique if I had a layout book handy but the curve-o-mark seems like a good tool.Miller Multimatic 220ACMiller Thunderbolt 225Victor OA
Reply:Originally Posted by _DomCurve-o-mark should do it. Kinda spendy but will pay for itself if you are cutting many different angles.
Reply:I lucked out in the end.  Customer made a last minute change to pipe rails in place of the tubing.  We are now going to cut the square tubing posts with circle burner template on a torch and sleeve in pipe.  No fancy angles and no saddles either.  Should make life easier on the high school boys I hired to do most of the work.Sent from my iPhone using Tapatalk
Reply:Miracle point would work great too, but they're a lot more expensive than a curve-o-mark.IMPEACH BIDEN!NRA LIFE MEMBERUNITWELD 175 AMP 3 IN1 DCMIDSTATES 300 AMP AC MACHINEGOD HELP AMERICA!“Freedom is never more than one generation away from extinction.We didn’t pass it to our children in the bloodstream".RONALD REAGAN
Reply:biguglydave Originally Posted by biguglydaveI lucked out in the end . . . We are now going to cut the square tubing posts with circle burner template on a torch . . .No fancy angles . . . Should make life easier on the high school boys I hired to do most of the work.
Reply:Depends on the high school students doing the work and how good their instructor is. I went to a trade school and the biggest project in my class was a tandem axle horse trailer but all the welds and workmanship was fully inspected. Another shop used to build campers for trucks. Don't know what the current group of students has for a skill set though. Sadly most trade schools are disappearing.
Reply:I read that the customer changed up the original plan. But I think you just need to scribe, to mark for the cut. You cut a piece of wood the thickness that a marker resting on it will just touch the furthest point of the piece you are cutting, and then just mark both sides using that same piece of wood and you should have your cut marked. Sincerely, William McCormickIf I wasn't so.....crazy, I wouldn't try to act normal, and you would be afraid.
Reply:im a 21 year old fabricator and just read all these threads. seems like your problem is solved but i had an idea. y'all let me know what yall think. take a drop piece of tubing and cut it at a 45 (or any angle that you wont be exceding on your cuts, im would assume it would be around 25 degrees) then place that on a piece of wood and cut it out with the intent of keeping the outside piece so that it would fit over the outside of the tubing. then cut it in half. mark your height on each 4" post of where the "Diamond" will sit. put the top of your wood "Jig" on that mark and just slide it to the edge of the 4" Post so that the you could slide your actuall tubing into it from the side and just trace a line on it to cut. should be perfectly square with the post and to get your height just measure up from the ground the same amount on each side to keep it parallel??? i may have misunderstood the question but just a thought. im on here to learn so yall just let me know.