A. To determine the handing of a door lock, stand outside (the side requiring a key if applicable) the room or building facing the door:
For more information see our page on door handing.
A. A lock which by reversing the latch bolt may be used on either a left or right hand door.
A. Measure from the edge of door to the center of the bore hole or the lock body that you are replacing. Most backsets are either 2-3/8" or 2-3/4".
A. Lock functions control the flow of people through a building. For more information please see our Lock Functions page.
A. A Single Cylinder is controlled by a key on the outside and a turn knob on the inside.
A Double Cylinder is controlled by a key on both the outside and inside. Normally used where you have glass next to the lock, which can be broken and the lock opened if a turn knob was there.
A. This is the most common type of latch/lock found on doors in the U.S. They are used on most standard pre-drilled factory doors. You may not recognize the entire part, but the Latch Bolt should look familiar to you, as it sticks out the edge of a door.
A. A mortise lock is a lock that requires a pocket to be cut into the door in which the lock is to be fit. Mortise locks are found on older buildings, but they have recently become more common in commercial construction. They are designed to fit in a cavity that is approximately 7" long by 2" to 6" deep in the edge of a door.
A. This mostly depends on the level of security needed or desired, emergency egress codes, and whether the lock is going on an interior or exterior door. Contact us for more information.
A. A higher security latch bolt incorporating a plunger that is held in a retracted position when the door is closed, preventing it from being slipped open (by a credit card). Usually on keyed levers and knobs.
A. A metal plate that receives the door bolt or latch when the door is closed. Strike plates come in many shapes, styles and sizes for different applications.
A. Insert the latch into the face plate opening, ensuring that the sides of the face plate line up with the flat surface on the latch collar. Push flush with the drive-in collar. Then grasp the face plate in one hand and the latch in the other hand and rotate the face plate clockwise to snap in to the collar.
A. For standard door applications either interior or exterior, standard butt hinges cover most applications. A continuous hinge (also known as a “piano hinge”) is best suited for functionality of heavier doors, high traffic doors, replacing worn or broken pivots, or replacing the door on an already existing frame that has different hinge locations.
A. They can found on most commercial doors. The two leaves of the hinge are connected together with a pin. Hinges are actually quite important and can go a long way in either increasing or decreasing both the security and longevity of your doors.
A. A door closer is a mechanical device that controls and closes a door, typically after someone opens it. Choosing a door closer requires the consideration of a variety of criteria including the closer's performance in fire situations, control over the rate of closing, safety, durability, risk of vandalism and aesthetics.
A. The volume of usage the closer will endure each day, and the weight and size of the door determine the type of closer needed for door conditions. For additional information please read our door closer information page.
A. The active door is the one that opens first and to which the lock is applied. The inactive door opens only after the active door and is locked in place with Flush Door Bolts or Surface Mounted Door Bolts.
A. In the U.S. most doors are 1-3/8" or 1-3/4" thick. Most standard door hardware is manufactured to fit 1-3/8" - 2" thick doors. Some manufacturers have extension kits, or will build a lock to fit a thickness over 2 inches. A typical residential interior door is 1-3/8" thick and an exterior door is 1-3/4" thick. Interior and exterior commercial doors are usually 1-3/4" thick.
Feel free to contact us anytime with questions. You can call us at 844-DOORNOW (844-366-7669)
*NOTE: The content of this page is presented for informational purposes only and is not meant to serve as complete door hardware installation or usage instructions, which are provided by the manufacturer. Commercial Door Hardware Supply is not responsible for installation or performance of hardware it sells, and cannot be held liable for improper installation.