1.1 ,This specification covers the chemical, mechanical, and dimensional requirements for roof and rock bolts and accessories. Addressed in this specification are double-end threaded bars, fully grouted bolts and threaded bars, mechanical anchorage devices used for point anchorage applications, roof truss systems, partially grouted deformed bolts, bearing plates, cable bolt systems, expandable rock bolts and other frictional anchorage devices. All of these products represent various designs used for ground support systems. This specification can be revised to address new technologies.