When it comes to fixing overhead door closers, have you ever wondered what the various fixing positions are called? Or have you been told to fix in Fig. 1 position and not known what is required? In this blog, we cover the 3 fixing positions for an overhead rack and pinion door closer.
Fig. 1 - Standard Installation
It's the most common fixing position, on the "pull" side of the door. Also known as ISO 0 although this term is not commonly used in the UK.
The closer is mounted on the door, and the arm attaches to the frame above.
history: a hardware distributor had an illustrated catalogue, with a picture of a closer fitted in this configuration, it was labeled "figure 1". the name stuck because it was an easy way of identifying which closer you required.
Fig. 66 - Parallel Arm Installation
In this fixing position, the door closer sits on the door under the frame, on the "push" side of the door. Also known as ISO 1, again we don't often use this term in the UK. When closed the arm is parellel to the door (it doesn't stick out at a right angle).
There are are number of situations where you'll need to fit a closer in this configuration. Outward opening doors are a great example, as it keeps the closer from being vandalised, and out of the great British weather!
The closer is mounted on the door, and the arm attaches to the frame above, via a parellel arm bracket.
Fig. 61 - Transom Mounted Installation
This is an alternative fixing position for the "push" side of the door. Essentially its a Fig. 1 closer fitted upside down on the opposite side of the door. This is also known as an ISO 5.
The least common mounting position of all, great alternative to Fig. 66 when there is not enough depth on the frame to fit a parallel bracket, or the top rail is too thin to get a good fixing.
The closer is mounted on the frame, and the arm attaches to the door below.