2018DIN 18111-1:2018-10 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
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 18111-1:2004 Door frames - Steel door frames - Part 1: Standard door frames for rebated doors in masonry