Pair of Pants
To insert a pair of pants fitting, go to
Ribbon: 
Pair of Pants
Pulldown Menu:
You will be prompted to specify the duct on which a pair of pants is to be inserted.
Select duct or label to insert fitting at:
The Fitting Radius dialog box will appear.
- Â Radius: The radius multiplier for the fitting. This value will be multiplied by the width of the duct to determine the radius of the fitting.
Enter the radius of the elbows in the pair of pants fitting and press the button. A pair of pants fitting with the specified radius will be inserted on the drawing, as shown below.
Related Options
Radius for elbows: Sets the default value for the Radius field.