Not all door ways are the same, which is why Rixson has developed a pivot for those more difficult doors such as headers that are not easily accessible.
You will now find a pivot package that has two load bearing intermediate pivots and a bottom pivot. There is no top pivot in this package.
The set includes 2 each M190 side jamb pivots and the Rixson 147 bottom pivot. There is of course a weight bearing capacity and this is 500#, door widths up to 40″, height to 90 inches. Don’t worry there are other solutions if the door is taller. All you will need to do is add a M19 for every 30″.