What is a double door astragal?
With double doors, an astragal is attached to the vertical meeting edge of one door leaf. The astragal can be attached to the active (entries/exits) or inactive leaf, depending on the function and application. On double egress doors, astragals can be attached to either leaf since both are active.
Does a double door need an astragal?
Astragals are required on:
Double doors – swinging in the same direction. Double Egress – swinging in opposite directions.
The gap at the bottom of an interior door should be 2 inches from an unfinished floor. Over a finished floor, the gap should be between ¾ to ½ of an inch, depending on the type of floor you have. The gap at the bottom of an exterior door should be almost nonexistent.