DIN EN 15269-11:2017-01

This European Standard covers vertically mounted types of manual or powered, operable fabric curtain assemblies with downward closing operation. Curtain systems are different from (are separated from) door systems due to their not rigid closure element typically made of thin walled materials as for instance woven or knitted fabrics and foils. These closure elements are not able to carry significant loads normal to their surface by their bending stiffness. In other words curtain systems are separated from door systems because they can only conduct pulling forces by tensile stress in-plane to their surface. Pushing forces are not conducted in-plane to their surface.