This is a pair of double doors leading to an Information Technology Server Room, off a Fire Corridor. The room has occupancy of less than 50. Frequently, heavy carts are moved into and out of the room by two or more people. Accordingly, the door is opened by an automatic operator. The room is equipped with an FM-200 Fire Suppression System, so quick egress is required. The doors are recessed into a pocket so that the doors can swing out toward the hallway without extending into the hallway.

First, let's begin with the entire list of possible locks including those that we will not use:

Now, let's analyze the selection process, step by step:

Let's try a few more examples.

This time let's look at a set of framed glass doors that leads from a company cafeteria to an outdoor employee patio (Figure 14.2). The doors are unlocked from the outside by a card reader. These doors are from an area with occupancy of 200, so they are classed as fire exit doors.

These are 10-foot tall unframed glass doors in the Main Lobby of a Class A Office Building. The Owner wants to make a good impression on everyone entering the lobby, but he wants to lock the doors after hours, allowing only those who have an access card to enter.

Next, let's look at a stair-tower door in a high-rise building (Figure 14.4). The stair-tower is pressurized and the door is hollow metal. The door will be electrically locked to permit re-entry only to authorized personnel. The door leads from occupancy of less than 50.

Now, let's take a look at a single, rear-exit door on a warehouse. This is a hollow metal door and the warehouse has been broken into a couple of times through weak door hardware. We are looking for something very robust. The door is a fire egress door.

In this selection, we have a 12 foot solid core wood door that leads to/from an office suite with occupancy of less than 50. The Owner wants to maintain the original look of the door. The door swings out of the suite into the corridor.

In hospitals, it is common to see Double-Egress Doors that allow the passage of a gurney or cart in both directions. The doors will not have a center mullion, so there will be a clear expanse of space when both doors are open. These doors will get a lot of abuse as carts go through them, and each will be operated by its own Automatic Door Operator. This is a new hospital.

This is a simple application. The office includes storage of important files and has occupancy of six workers. The door is a solid core wood door in a middle-management environment. It is an existing door in an aluminum frame, so frame strength is an issue. The door is existing, in use, and is currently equipped with a mechanical cylinder lock.

This is a Revolving Door on a 4th floor Corridor that leads directly from an Elevator Lobby to an adjacent Parking Structure. We need to ensure that visitors do not enter at this level and we want to ensure that we account for every person who comes and goes into the adjacent Trading Room. A Revolving Door has been recommended to deal with the accounting of people coming and going, but in this circumstance, fire code requires an adjacent exit door. The adjacent door is a framed glass door. The Owner wants the adjacent door locked at all times, which is not allowed under fire code.