Solebar

The underframe, which has been designed to take buffing loads of 200 tons both on the centre coupler and on the retractable side buffers, consists of two centre girders from which cantilevers project to support the solebars, which in turn carry the bodyside structure.

The shuttle locomotive body is a conventional stress-skin monocoque structure, with longitudinal members at solebar and cantrail levels.

The bolster to solebar weld on one side, and the weld between the solebar and the front headstock on the other side had broken completely.

[...] the original Chalice built coaches have a deep solebar, while the Keef coaches were much shallower.

Sometimes the door also cuts off main structural components such as the solebar or cantrail.