I often receive calls from customers regarding newel caps and how they work. I though I would post this as a reference for my clients.
There are generally three ways of attaching handrails to stair newels. The first and maybe the most common is called “post-to-post”. In this case the handrail is attached to a “flat” on the newel post . You can see this below in Type A.
Larger View
Type B and Type C are both examples of “over-the-post”. In this scenario, the handrail is continuous, not stopping between the newels. These newels are often called “pin” tops because of the dowel pin used to fasten the rail fitting or cap to the newel. (Note that in type B I am not showing the pin but have instead drawn the cap fitting over the pin) In type C, a rail fitting is purchased from the stair parts supplier and fitted over the pin. This fitting is joined to the handrail by the installer.
In the case of type B, the cap is custom made by the turner to match the profile of the handrail. (see the drawing below)
Larger View
This drawing depicts the pin on top of the newel for joining the newel cap as well as a “birdseye” view of the cap and the mitered joinery to the handrail.
