The hollow profile, which is designed as a floor main profile (1), roof main profile (2) and/or support profile (3) for the metallic frame structure, has a longitudinal structure (71, 72,...) extending along the longitudinal direction of the profile and originating from an outer profile surface, said longitudinal structure being formed as a longitudinal elevation or longitudinal groove and having a width at its attachment to the profile outer surface of less than (20, 15) or (10) millimetres in the direction transverse to the longitudinal direction of the profile.
Wir kommen spater wiederpatents-wipo patents-wipo