floor element 63 is provided as the ground floor of the housing unit the floor element 63 lies on the upper edges of the main floor profiles 11 12 and the secondary floor profiles 41 an additional longitudinal structure 73 protrudes at the outer edges of the main floor profiles 11 12 this longitudinal structure 73 forms a boundary of a longitudinal channel 81 along each main floor profile 11 12 and serves to receive the wall elements 62 the wall elements are thus framed all around on their outside surfaces facing away from the interior of the housing unit by outer longitudinal structures 73 75 which are formed as folds on the main floor profiles 11 12 and the support profile 3 the floor cladding 61 the wall elements 62 the floor element 63 and the insulation element 64 of fig3 are not shown in the exploded view of the frame structure in fig4 for reasons of clarity the roof corner connection corresponding to fig3 and 4 is shown in fig5 and 6 as a three dimensional sectional drawing in fig5 and as an exploded view in fig6 this is hereby the same support profile 3 as shown in fig3 and 4 this is likewise closed at the top by means of a stacking plate 31 in fig5 and 6 lift and holding bores 51 are moreover visible in the stacking plate 31 and in the support profile 3 and can be used to connect together several frame structures which are arranged side by side and or stacked one above the other end faces of two main roof profiles 21 22 are now inserted and fixed by means of screws in the two longitudinal channels 82 formed by means of the longitudinal structures 74.