tensile failure where wall rock displacements are large or dynamic. A simple means to prevent this kind of failure has been developed by Duraset in association with SRK Consulting. The principle utilized to provide a standard cable strand with dynamic capacity is described in this paper. In order to accommodate unusually long grouted tendons in available laboratory facilities, a special testing apparatus was devised. The principle of operation and method of construction is briefly described and preliminary results in both static and dynamic mode, are presented. Static and Dynamic Load-Displacement Characteristics of a Yielding Cable Anchor—Determined in a Novel Testing Device