This standard applies to multi-section support arches for mining and tunneling, made from mining GI-profiles as per DIN 21541 for useful cross-sections rainging from 5.4 m<(hoch)2> to 20.2 m<(hoch)2> (cross-sectional size B 5.4 to B 20.2). Dimensions, designations, and materials are specified.#,,#