BS EN ISO 20320:2020 pdf download.Protective clothing for use in Snowboarding — Wrist Protectors — Requirements and test methods.
4.3 Ergonomics When tested in accordance with 5.4, the assessor shall be able put on and take off the two wrist protectors by themselves without any discomfort, significant problem or hazard being encountered. When tested in accordance with 5.4, the accessor shall be able to close and open the binding system by themselves while wearing wrist protectors.
4.4 Innocuousness The product shall comply with the requirements in ISO 21420:2020, 4.2. The tested sample shall not show permanently deformed nor broken parts, when tested according to 5.7 and 5.8. Straps and closures of the tested samples shall not open during the tests according to 5.6 and 5.8. The handling of the wrist protector during tests according to 5.4 and 5.5 shall not show roughness, sharp edges, projections and the like which could cause excessive irritation or injuries. If splints are used for limitation of the wrist extension, their dimensions must fulfil the requirements of 4.2.
4.5 Restraint When tested in accordance with 5.5, the displacement Δl (see Figure 2: l 2 − l 1 ) of each test shall not exceed 20 mm.
4.6 Impact strength When tested in accordance with 5.6 all components of the wrist protector shall not break or split.
4.7 Impact performance Wrist protectors can have protection elements that protect the palm against impact. When tested in accordance with 5.7 all measured impact forces shall not exceed 3 kN.
4.8 Limitation of wrist extension Wrist protectors shall be sufficiently stiff that when tested according to 5.8 and loaded with torque 1 according to Table 8 all resulting angles of the artificial wrist joint (extension 1) shall be within 50° to 75° (extension 1 = 50° … 75° ± 1°). When tested according to 5.8 and loaded with torque 2 according to Table 8, all resulting angles of the artificial wrist joint (extension 2) shall be within 55° to 80° (extension 2 = 55° … 80° ± 1°). When torque 2 according to Table 8 is applied, extension 2 shall be at least 5° greater than extension 1 at torque 1 (extension 2 – extension 1 ≥ 5° ± 1°).
5.4 Ergonomics An assessor of suitable hand size shall put on, tighten and take off both wrist protectors (left and right) by themselves (without external support) as specified in the information supplied by the manufacturer, including gloves for wrist protectors, provided to be worn with gloves. An assessor shall fix and then unfix themselves to a snowboard by closing and then opening the binding of the snowboard (left and right) while wearing wrist protectors and gloves on both hands (right and left).BS EN ISO 20320 pdf download.