A metallic frame structure of a container-like, modular and mobile housing unit, more particularly a residential container, an office container or a room module, comprising: - horizontal main floor profiles which are connected detachably to one another to form a floor frame; - horizontal main roof profiles which are connected detachably to one another to form a roof frame; - vertical support profiles which are each connected detachably to the main floor profiles of the floor frame by means of a floor corner connection and to main roof profiles of the roof frame by means of a roof corner connection so that the floor frame and the roof frame are connected together parallel and at a vertical distance from one another, wherein the support profiles are designed and arranged so that when stacking two or more frame structures on top of each other, a further frame structure stacked on top is supported mainly by means of the vertical support profiles, wherein - at least one of the main floor profiles, main roof profiles and/or support profiles is a hollow profile of metal which has at least two longitudinal structures (71, 72...) extending along the longitudinal direction of the profile and originating from an outer profile surface, which longitudinal structures are each designed as a longitudinal elevation having an origin width of less than 20, 15 or 10 millimetres at its origin at the outer profile surface in the direction transverse to the longitudinal direction of the profile, - the hollow profile with the at least two longitudinal structures (71, 72,...) is formed from metal sheet, preferably steel sheet, which is bent in one piece, two pieces or many pieces and welded along the longitudinal direction of the profile, wherein the longitudinal structures (71, 72,...) originating from the outer profile surface are formed by means of bending, and - the at least two longitudinal structures (71, 72,...) of the hollow profile are designed as longitudinal elevations so that they form a contact edge for contacting a section of one of the main floor profiles, main roof profiles and/or support profiles. - horizontal main floor profiles which are connected detachably to one another to form a floor frame; - horizontal main roof profiles which are connected detachably to one another to form a roof frame; - vertical support profiles which are each connected detachably to the main floor profiles of the floor frame by means of a floor corner connection and to main roof profiles of the roof frame by means of a roof corner connection so that the floor frame and the roof frame are connected together parallel and at a vertical distance from one another, wherein the support profiles are designed and arranged so that when stacking two or more frame structures on top of each other, a further frame structure stacked on top is supported mainly by means of the vertical support profiles, wherein - at least one of the main floor profiles, main roof profiles and/or support profiles is a hollow profile of metal which has at least two longitudinal structures (71, 72...) extending along the longitudinal direction of the profile and originating from an outer profile surface, which longitudinal structures are each designed as a longitudinal elevation having an origin width of less than 20, 15 or 10 millimetres at its origin at the outer profile surface in the direction transverse to the longitudinal direction of the profile, - the hollow profile with the at least two longitudinal structures (71, 72,...) is formed from metal sheet, preferably steel sheet, which is bent in one piece, two pieces or many pieces and welded along the longitudinal direction of the profile, wherein the longitudinal structures (71, 72,...) originating from the outer profile surface are formed by means of bending, and - the at least two longitudinal structures (71, 72,...) of the hollow profile are designed as longitudinal elevations so that they form a contact edge for contacting a section of one of the main floor profiles, main roof profiles and/or support profiles.