2018DIN 18111-2:2018-10 Door frames - Steel door frames - Part 2: Special door frames (single and double shell) for rebated and unrebated door leaves in masonry and for metal stud gypsum walls
2018DIN 18111-1:2018 Door frames - Steel door frames - Part 1: Standard door frames (single or double shell) for rebated doors in masonry and for metal stud gypsum walls
2004DIN 18111-2:2004 Door frames - Steel door frames - Part 2: Standard door frames for metal stud gypsum walls