View Full Version : metal duct formulas

12-12-2014, 11:04 AM
Wanting to know the formulas for 45 90 30 degrees with an example having trouble understanding them

12-12-2014, 11:34 AM
Welcome to the forum.

That's one big question. A lot of different possible answers. Can you be a little more specific on which type of elbows you're having trouble understanding such as radius heel, drop cheek, transitiona, l ect.

Thanks for joining us. I'm sure we can help you...just maybe not in one answer.:)

12-12-2014, 07:08 PM
Well like 45 degree angle

12-14-2014, 05:42 AM
What exactly do you mean by formulas? Do you mean how to lay one out to fabricate?

12-15-2014, 05:14 PM
Are you looking for the heel and throat stretch out formulas? I can give you those. Other than that you need to be more specific.