HOW TO MEASURE A WINDOW LOCK

STEP 1 : NOTE THE POSITION OF THE LOCKCASE RELATIVE TO THE FACEPLATE

In the first instance, you should note the position of the lockcase relative to the faceplate - inline or offset.

The top example shows an offset lockcase - it is positioned on one side of the faceplate. An inline lockcase (as per the image on the bottom) sits centrally on the faceplate.

STEP 2 : IDENTIFY THE RAIL SHAPE

Looking at the rail end-on, identify the rail shape (see Fig. 1).

The top image is a flat rail; the bottom image shows a U-shaped rail.

STEP 3 : TAKE THE MEASUREMENTS

The next step is to take a series of measurements:

A: Backset The distance from the middle of the spindle to the front face of the lock.

B: Faceplate length The distance from the top to bottom of the faceplate which sits flush on the window.

C: Faceplate width The horizontal width of the faceplate that sits flush to the window.

D: Cam height The height of the mushroom (or roller) cams at each end of the rail.

June 9, 2020 | View: 6138 | Categories: How To Guides | By: <a class="mp-info" href="https://www.upvcmaintenance.co.uk/blog/author/admin.html">Admin</a>