This document specifies additional safety requirements for stationary strength training equipment. This document is intended to be read in conjunction with the general safety requirements of ISO 20957-1:2013. This document is applicable to stationary training equipment type strength training equipment with stacked weight resistance or other means of resistance, such as elastic cords, hydraulic, pneumatic, electrical, magnetic, springs and externally loaded weights (hereinafter referred to as stationary training equipment) with the classes H, S and I according to ISO 20957-1:2013. NOTE 1 Free-weight barbell racks are also subject to the requirements of ISO 20957-4:2016 and ISO 20957-1:2013. NOTE 2 Accuracy classes are not applicable to this type of stationary training equipment as accuracy classes will not affect the safety of this equipment.