ÖNORM ISO 7797

This International Standard specifies a method for determination of the resistance of defined Parts of Cross-country skis to breaking when quasistatically loaded. A load applied to a ski usually leads to a predominantly elastic deformation followed by a sudden break. The Optimum stiffness distribution, breaking strength and deflection at break depend on the application for which the ski is designed. These applications demand variations from stiff skis with high breaking strength, but relatively low deflection at break, to soft skis which tan withstand large deflections, but have a relatively low strength. Consequently, the values of the breaking strength and breaking deflection cannot be direct!y related to the Character of the ski. The test is applicable to all sizes of Cross-country skis for adults, juniors and children. This test procedure shall not be used for determination of breaking load of ski structures with relatively high plastic deformation (for example skis with steel edges or skis with aluminium skins).