Double Acting and Double Egress Doors

These 2 terms sometimes cause confusion, so let's clear it up! Double acting means the door swings in AND out...versus in OR out for a standard (single acting) door. You'll see this in a lot of restaurants going into the kitchen. This can be a single door or a pair of doors. You'll need a special frame for this application called a Cased Open frame.
Double egress is always a pair of doors (never a single door) and allows each door to swing in the opposite direction. You will usually see these in corridors and they are frequently used in hospital corridors. These doors provide quick exit/entry from either direction of traffic flow. You'll also need a special frame for this application as you can see in the picture.