Ferrules for use with cast iron chairs baseplates static loading tests to ascertain the suitability of different materials in the form of ferrules (E-463)

1. Polythene ferrules, purchased to B. R. Specification No. 515, have been in extensive use during the last five years and have proved satisfactory except at a few locations where mechanical conditions are severe, notably on sharp curves. In these places, distortion and/or wear has taken place, permitting appreciable gauge...