This part of EN ISO 13935 describes the strip test determination of the seam maximum force of sewn seams. Part 2 will describe the method known as the grab test. The method is mainly applicable to woven textile fabrics. It can be applicable to fabrics produced by other techniques. It is not normally applicable to woven elastic fabrics, geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns. The sewn fabrics may be obtained from previously sewn articles or may be preprared from fabric samples. This method is applicable to straight seams only and not to curved seams.