Structural system and shelf

1. A structural system for modular construction of shelves, comprising:

a set of elongate vertical supports, each vertical support having at least one axially extending row of holes;

a set of frames, each frame of the set of frames having four struts, of which two struts are connected to one another via a mounting corner piece of the frame; and

a set of connectors, each connector of the set of connectors being configured to be inserted into a hole of a respective vertical support of the set of vertical supports and secured to a respective mounting corner piece of the mounting corner pieces of a respective frame of the set of frames,

wherein the structural system is configured such that, in an assembled state,

at least one frame of the set of frames is secured by mounting corner pieces of the at least one frame to four vertical supports via respective connectors,

two respective neighboring vertical supports that are connected to one another via one of the struts of the at least one frame define a support plane, and

the four struts of the at least one frame lie outside the support planes defined by the four vertical supports connected to the frame.

2. The structural system according to claim 1 , wherein each of the mounting corner pieces of the frames

interconnects two struts substantially at right angles, so that the mounting corner piece defines an external angle of substantially 270°, and

has a connection extension which extends substantially in a direction of a bisecting line of the external angle.

3. The structural system according to claim 2 , wherein each of the mounting corner pieces of the frames is equipped with a receptacle that is configured for vertical introduction of one of the connectors.

4. The structural system according to claim 3 , wherein the receptacle is arranged on the connection extension.

5. The structural system according to claim 3 , wherein a respective frame of the set of frames is configured to be secured to four vertical supports of the set of vertical supports by a respective connector mounted on each of the four vertical supports being introduced into a respective receptacle of each of the mounting corner pieces of the respective frame.

6. The structural system according to claim 1 , wherein each of the mounting corner pieces of at least two of the frames of the set of frames is equipped with a clamping mechanism that is configured to clamp the associated frame to the vertical support to which the associated frame is secured via a connector.

7. The structural system according to claim 1 , wherein the frames of the set of frames are configured to be identical except for a length of the struts.

8. The structural system according to claim 1 , comprising a set of single shelves, each shelf being adapted to be placed on one of the frames when mounted on the vertical supports.

9. The structural system according to claim 8 , wherein each shelf of the set of single shelves is substantially rectangular.

10. The structural system according to claim 8 , wherein each of the single shelves comprises four corner pieces, and wherein each corner piece is configured to partially encompass one of the vertical supports.

11. The structural system according to claim 8 , wherein

the struts of the frames are equipped with first alignment structures, and the single shelves are equipped with second alignment structures, and

the first alignment structures of the frames and the second alignment structures of the single shelves are configured so that the single shelves can be placed on the frames in a predefined position.

12. The structural system according to claim 11 , wherein the first alignment structures have receptacles, and the second alignment structures have projections matching the receptacles.

13. The structural system according to claim 1 , wherein each of the connectors has a hook portion which is configured to be hooked into one of the holes of one of the vertical supports.

14. The structural system according to claim 1 , wherein the set of vertical supports comprises at least one vertical support having a plurality of axially extending rows of holes.

15. The structural system according to claim 1 , wherein the set of vertical supports comprises at least one vertical support having a single row of holes extending along the at least one vertical support.

16. The structural system according to claim 1 , wherein the set of vertical supports comprises at least one vertical support having exactly two rows of holes extending along the at least one vertical support.

17. The structural system according to claim 1 , wherein the set of vertical supports comprises at least one vertical support having exactly three rows of holes extending along the at least one vertical support.

18. The structural system according to claim 1 , wherein the set of vertical supports comprises at least one vertical support having exactly four rows of holes extending along the at least one vertical support.

19. The structural system according to claim 1 , wherein each of the vertical supports has a circular outer circumference in cross section.

20. The structural system according to claim 19 , wherein each of the vertical supports comprises a tubular body shaped as a round tube.

21. A shelf constructed from a structural system according to claim 1 .