AS ISO 20957.4:2021 pdf download – Stationary training equipment Part 4: Strength training benches, additional specific safety requirements and test methods.
1  Scope This document specifies safety requirements for stationary strength training benches and free‑ standing barbell racks in addition to the general safety requirements of ISO 20957-1. It is intended to be read in conjunction with ISO 20957-1. This document is applicable to stationary training equipment type benches (type 4) (hereinafter referred to as benches) with the classes S, H and I according to ISO 20957-1. 2  Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 20957-1, Stationary training equipment — Part 1: General safety requirements and test methods 3  Terms and definitions For the purposes of this document, the terms and definitions given in ISO 20957‑1 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http:// www .electropedia .org/ — ISO Online browsing platform: available at http:// www .org/ obp 4  Classification The classification shall be according to ISO 20957‑1. 5  Safety requirements 5.1  General Depending on the design of the training equipment, the following requirements shall apply as appropriate. 5.2  Benches with fixed barbell supports 5.2.1  Stability of the barbell Overturning of the barbell by an unequal load shall be prevented either by the distance between the supports or safety device. Test in accordance with 6.2.
5.2.2  Lateral stability of benches with fixed barbell supports Benches with fixed barbell supports shall be stable when loaded with unequal load at right angles to the longitudinal axis. Test in accordance with 6.3. 5.2.3  Longitudinal stability of benches with fixed barbell supports Benches with fixed barbell supports shall be stable in the longitudinal direction with respect to the bench. Test in accordance with 6.4. 5.3  Free‑standing barbell supports Free‑standing barbell supports shall have a device for connecting to the ground. Test in accordance with 6.1.2. 5.4  Dimensions of the barbell support The front part of the support (yoke), when measured with a (30 ± 1) mm diameter bar, shall have a vertical height of 20 mm to 40 mm (see footnote a in Figure 1) above the lowest point of the resting bar and the rear part shall be ≥80 mm higher than the top of the front of the support (yoke) (see Figure 1).