HeleH Italy tips: The way to measure other handle lock types

Description: Measuring a deadlock is easier than measuring a sash-lock because of handle alignment. You want to know more types of handle lock measure way?! Fllow HeleH Italy article now!

The most simple way to measure a dead handle lock

The case depth

The case depth of a handle lock often simply appears as the 'lock size'. There are many different case depths, however, the most common sizes are 64mm and 76mm. This is the metric equivalent to 2.5" and 3" handle lock cases from back. Moreover, in the imperial days, you may well have heard the term "3 inch lock case".

The case height

This varies a lot based on manufacturer and age of your exterior handle lock. In fact, the height is smaller on deadlocks than on sash locks. There is no follower or latch to house in the case. Therefore, this is usually somewhere near the same as the case depth, appearing fairly 'square' in size.

Picture 1: The dead handle lock height depth and height are different depending on its design

The backset

The backset is an important measurement specifies distance from the face of lock to the centre of keyhole. It allows you to correctly line up with existing holes in the door rather than drilling new ones. The most common sizes here are 44mm and 56mm that take a few millimetres.

Some manufacturers measure with the finishing faceplate left on, whilst others measuring. So by all means take measurements with and without the faceplate. As a result, you will soon see one of them matches the purchasable options available.

The faceplate or forend size

The size of the faceplate is not usually critical, but it's always better for a clean finish to match up with your existing locks when possible. Failing this, you can go for a larger forend size, allowing you to cover up markings left of the previous lock.

How to measure a multipoint handle lock

The PZ Centres

The PZ Centres measurement is the distance between the centre of the keyhole and the centre of handle lock. It is possible you may have two square spindle followers. This is referred to as a twin-follower lock. In this case, you should take both measurements, each from the centre of rounded part of keyway.

Locking Distances

This is the distance from the square follower to the centre of each of handle lock points. Once you have a twin-spindle setup as mentioned above, then take both. This is because different manufacturers will measure from different points.

Picture 2: Measuring handle lock is very important before installing it

Some may even measure from the centre of the keyhole, but if this is the case, you can always add the PZ measurement taken in label A to make up the difference. Similarly, having twin spindle gearbox, you can add the difference between the two PZ measurements. Moreover, if you measured to top follower, the PZ centres are 62mm and 92mm, you could add difference - 30mm.

E & F - Rail / Strip Size

The metal strip that runs along the edge and holds all of handle lock points in place. People often call them as the 'locking strip' or 'lock rail'. The length is usually not critical, because they are mostly in over-sized status.

If you have radius edges though, then this becomes a bit more sensitive. The width is more important. This varies, but is typically 16mm for uPVC doors and 20mm for composite and wooden doors. These are normally all flat, however, some european multipoint locks have curled sides - a U-Rail.

How to measure a door latch - final handle lock type

The case depth

This is often ambiguously and fairly of handle lock misleadingly referred to as the 'case size'. It is indeed the overall size of the latch from front to back, but more importantly, is a critical measurement due to it being the overall depth that is going to sit into the door stile.

Picture 3: HeleH Italy gives you information about distance of 3 types of handle lock in this article

The backset

Whilst there is no keyhole to consider on a mortice latch. You still need to consider the backset of the follower for handle lock or knobs you have on the door. To avoid chafing or having to drill new holes in your door, how?! Make sure you measure accurately the distance from the front face to the centre of the square hole.

The case height

Nice and simple, this is just the height of the case. But don't confuse this for the length of the face plate! The case height of this handle lock should be the height of the lock body only.

The forend size

The front plate that sits on the edge of the door once handle lock fits. It is referring to as the forend or faceplate of the lock. Simply measure the length and width so you can match up as best as possible for a clean finish on the edge of your door.

If you have any question and defusing about handle lock measuring way, contact us here: http://heleh.it/.