Abstract: The invention relates to a metallic frame structure of a container-like, modular and mobile housing, an assembly kit for such a housing, a container-like, modular and mobile housing, as well as a hollow profile for such a housing. 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. The longitudinal structure is formed as a longitudinal elevation or longitudinal groove and has 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.