Testing body system comprising at least two elements which can be coupled to one another and can be arranged one behind the other in a longitudinal direction (X) and/or next to one another in a preferably horizontal transverse direction (Y) at a right angle to the longitudinal direction (X) in order to form a train (T) which comprises the at least two elements and has a predeterminable total test load and/or a predeterminable X length and/or a predeterminable Y width and to guide it over a surface (W) of a measuring system, a) at least one first element of the at least two elements being designed as a receiving element (A) which extends with a length (L A ) in the longitudinal direction (X), with a width (B A ) in the transverse direction (Y) and with a height (H A ) in a vertical direction (Z) extending orthogonally to the longitudinal direction (X) and to the transverse direction (Y), and has a base surface (F) for resting on the surface (W), b) and at least one further element (A, D) of the at least two elements being designed b 1 ) as a further receiving element (A), of which the dimensions correspond to those of the first receiving element (A) or differ in at least one dimension therefrom, or b 2 ) as a spacer element (D) which extends with a length (L D ) in the longitudinal direction (X), with a width (Bo) in the transverse direction (Y) and with a height (H D ) in the vertical direction (Z); c) each element (A, D) designed as a receiving element (A) or spacer element (D) has coupling means (K) in order to be able to releasably couple two elements (A, D) to one another which are arranged directly one behind the other or next to one another in the X direction or Y direction, d) and each receiving element (A) having a main body (R) having one or more pockets (U), at least one pocket (U) being designed to temporarily receive a test weight (G), and characterized in that the pockets (U) extend into the main body (R) starting from an upper side (O) opposite the base surface (F) in the vertical direction (Z). a) at least one first element of the at least two elements being designed as a receiving element (A) which extends with a length (L A ) in the longitudinal direction (X), with a width (B A ) in the transverse direction (Y) and with a height (H A ) in a vertical direction (Z) extending orthogonally to the longitudinal direction (X) and to the transverse direction (Y), and has a base surface (F) for resting on the surface (W), b) and at least one further element (A, D) of the at least two elements being designed b 1 ) as a further receiving element (A), of which the dimensions correspond to those of the first receiving element (A) or differ in at least one dimension therefrom, or b 2 ) as a spacer element (D) which extends with a length (L D ) in the longitudinal direction (X), with a width (Bo) in the transverse direction (Y) and with a height (H D ) in the vertical direction (Z); c) each element (A, D) designed as a receiving element (A) or spacer element (D) has coupling means (K) in order to be able to releasably couple two elements (A, D) to one another which are arranged directly one behind the other or next to one another in the X direction or Y direction, d) and each receiving element (A) having a main body (R) having one or more pockets (U), at least one pocket (U) being designed to temporarily receive a test weight (G), <EOS>