Abstract: A structural system for the modular construction of shelves includes a set of elongate vertical supports, a set of frames and a set of connectors. The vertical supports have at least one axially extending row of holes, the frames have four struts, and the connectors are designed to be introduced into a hole a vertical support and secured to a mounting corner piece of a frame. The structural system is designed such that, in an assembled state, a frame of the set of frames is secured by its mounting corner pieces to four vertical supports via a relevant connector, 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.