What is Door Handing?

Door handing refers to the direction in which a door opens and the side on which the door hinges are installed. It is used to determine whether a door is considered left-handed or right-handed and is an important factor when selecting and installing door hardware such as locks, handles, levers, and closers.

Understanding door handing ensures that door hardware functions correctly and fits properly. Many types of commercial and residential hardware are designed specifically for either left-hand or right-hand doors, making correct identification essential during installation or replacement.

Door handing is commonly used in locksmith work, door hardware installation, and access control system planning.

Why door handing is important

Door handing plays a critical role in selecting compatible door hardware.

Key reasons it matters include:

• Ensures the correct lock or handle orientation

• Prevents installation issues with levers and exit devices

• Required when ordering commercial door hardware

• Important for door closers and panic bars

• Helps ensure proper door operation and safety

Without identifying the correct door handing, the hardware may not function properly or may need to be replaced.

How to determine door handing

Door handing is determined by observing the door from the outside or the side where the door opens away from you.

The basic method includes:

• Stand facing the door so it opens away from you

• Look at the side where the hinges are located

• If the hinges are on the left, the door is left-handed (LH)

• If the hinges are on the right, the door is right-handed (RH)

Some doors may also be classified as reverse-handed, depending on whether the door swings inward or outward.

Correctly identifying hinge position and swing direction is the key to determining door handing.

Types of door handing

Door handing is typically categorized into four main configurations.

Common types include:

• Left-Hand (LH) – hinges on the left, door swings inward

• Right-Hand (RH) – hinges on the right, door swings inward

• Left-Hand Reverse (LHR) – hinges on the left, door swings outward

• Right-Hand Reverse (RHR) – hinges on the right, door swings outward

These designations are widely used in commercial door hardware specifications.

Door handing and door hardware compatibility

Many types of door hardware must match the door handing to operate properly.

Examples include:

• Lever handles that are not reversible

• Mortise locks with directional latch mechanisms

• Exit devices and panic bars

• Door closers and concealed hardware

• Some smart locks and electronic locksets

Some modern hardware is designed to be reversible or universal, meaning it can be installed on either left- or right-handed doors.

However, many commercial-grade devices still require correct handing during installation.

Where door handing is commonly used

Door handing is an important concept in many door and security applications.

Typical situations include:

• Residential lock installation

• Commercial door hardware systems

• Access control installations

• Door closer mounting

• Panic hardware setup

• Locksmith repair and replacement work

Properly identifying door handing helps ensure that the hardware operates smoothly and securely.

Door handing is a simple but essential concept in door hardware installation. By identifying the hinge location and door swing direction, locksmiths and installers can choose the correct locks, handles, and security devices for safe and reliable operation.

Door Handing Overview