To measure the deadbolt, specifically its throw, you determine the distance the bolt extends from the door edge. The deadbolt throw is defined as the distance from the edge of the faceplate to the end of the deadbolt itself. This is a key measurement when assessing or replacing a deadbolt.
Understanding Deadbolt Throw
The "deadbolt throw" refers to the length of the bolt that projects out from the door edge into the strike plate when the lock is engaged. This projection is crucial for securing the door.
Based on common deadbolt types, standard throw measurements include:
- Half inch (0.5")
- Three-quarters inch (0.75")
- One inch (1")
These are the typical lengths you will encounter when measuring the bolt's extension.
How to Measure the Throw: Step-by-Step
- Extend the Deadbolt: Make sure the deadbolt is fully extended (locked position).
- Locate the Faceplate: Find the faceplate on the edge of the door. This is the metal plate surrounding the bolt.
- Measure: Use a ruler or measuring tape to measure the distance in a straight line from the edge of this faceplate to the furthest end of the extended deadbolt.
This measurement gives you the deadbolt throw.
Importance of Deadbolt Throw
The length of the deadbolt throw contributes to the security of the door. A longer throw typically engages deeper into the door frame, potentially offering more resistance against forced entry compared to a shorter throw.
For reference, here are the common throw sizes:
| Deadbolt Throw Measurement |
|---|
| 0.5 inches (Half Inch) |
| 0.75 inches (Three-Quarter Inch) |
| 1 inch (One Inch) |
Knowing your deadbolt's throw is important for verifying its security features and ensuring proper engagement with the door frame's strike plate.
