on the side facing outwards a this additional limb 16 can again be curved in a position indicated by 16 u2032 in the direction b in order to be able to compensate certain measurement tolerances a height adjustment device 17 is provided that can be defined in a connecting groove 152 as it can be seen the height adjustment profile can be defined for example by means of suitable counter nuts the height compensation profile h consists of two pieces namely the connecting profile 15 and the additional limb 16 as it is shown in fig8 b in order to make curving easier again a predetermined curving groove 160 with a corresponding opposite recess 161 is provided the additional limb 16 can be slid in a seating 151 for example with an angular deflection 162 thus mounting can be performed such that for example first the connecting profile 15 is fastened to the floor threshold 100 and then when the floor threshold 100 is also fixed to the floor b the additional limb 16 is added a design of this kind is an advantage in particular when larger height differences between outside a and inside i have to be overcome here the floor threshold 100 with the connecting profile 15 or the height compensation profile h configured thus helps creating a passage that can be overcome essentially also by handicapped vehicles or handicapped equipment in particular when renovating old buildings such a floor threshold can be employed very favorably as often just there such.