Pipe bending question

On this job we are doing theres a lot of structural steel posts on the inside corners of walls. They are just getting drywall glued to them ive been underbending 90s and then bending it to a true 90 from the front so like two 30 degree bends with a kick my problem is is i dont know how to calculate that for shrinkage or even know how far to make my next bend. Is there a name for this bend and a calculation?if its a 45 bend i put in it could i just measure it like an offset and do 1.5x the distance i need but how would i calculate what i gain.
 

480sparky

Senior Member
Location
Iowegia
I call it a 90° bend with an obstruction. There's different formulas to use if the obstruction is round, square or rectangular. I cheat and us an app called Conduit Bender Elite. IIRC, it's a paid app, but it's worth the money in that you have a visual graphic to go by on the screen, and just have to tap to enter the variables. It won't return any gain, however.
 

ritelec

Senior Member
Location
Jersey
Don't have your answer, I would make some marks on trial piece or pieces... when I find what works (and see what the shrinkage was.... Isn't that a Seinfeild episode?....) I would duplicate those measurements and bends..Sorry, know it's not what you were looking for.
 
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