Modular shelving system with highly flexible use

A modular shelving system, comprising:

• at least one first module comprising supporting feet, a bottom shelf, a top shelf, and a plurality of uprights, wherein a corresponding supporting foot is connected to the bottom shelf and the top shelf by a corresponding upright,
• wherein each of said feet comprises an adjustment element configured to permit horizontal leveling of said bottom shelf and said top shelf so that each of said uprights can be loaded with a peak or axial load so as to reach a capacity of said shelving system that is substantially equal to a nominal design load thereof,
• wherein each adjustment element comprises a truncated cone element adapted to rest on a support plane and a cylindrical element which is structurally independent from said truncated cone element, each cylindrical element comprising a first end adapted to be screwed and threadingly engage within an interior surface of a corresponding truncated cone element and a second end opposite the first end, wherein each second end is adapted to releasably engage a corresponding upright in a sleeved manner,
• wherein each adjustment element further comprises an elastically yielding adaptor ring for adapting the dimensions of the diameter of said cylindrical element to the dimensions of a diameter of corresponding through holes in said bottom shelf, said adaptor rings being elements of said feet and structurally independent from said truncated cone elements and said cylindrical elements,
• wherein each cylindrical element comprises a first set of retaining elements and each adaptor ring comprises a second set mating retaining elements adapted to mate with a corresponding first set retaining elements of a corresponding cylindrical element,
• wherein each first set of retaining elements comprises a plurality of housing seats formed on an exterior of each cylindrical element and each second set of mating retaining elements comprises a plurality of protuberances positioned on an interior surface of each adaptor ring, wherein a corresponding protuberance elastically engages and is inserted within a corresponding housing seat to secure a corresponding adaptor ring to the corresponding cylindrical element,
• wherein each adaptor ring has a cut parallel to its axis (S) along the whole length of each adaptor ring, wherein the cuts are configured to facilitate the elastic engagement of said protuberances with said housing seats, and
• wherein each adaptor ring comprises a collar protruding from an exterior surface of each adaptor ring, each collar having a lateral surface.