The weight of the units is self-supporting but the additional weight of the piping, elbows etc. in the field will not be supported by the expansion joint.
![55 inch double gimbal expansion joint for a reactor overhead line](https://usbellows.com/wp-content/uploads/1990/07/expjt-02a-300x172.jpg)
The weight of the units is self-supporting but the additional weight of the piping, elbows etc. in the field will not be supported by the expansion joint.