CN114729539A

CN114729539A - Step for modular staircases and relative construction method

Info

Publication number: CN114729539A
Application number: CN202080077703.8A
Authority: CN
Inventors: 马蒂厄·鲁菲尼
Original assignee: Ma DieLufeini
Current assignee: Ma DieLufeini
Priority date: 2019-11-08
Filing date: 2020-10-16
Publication date: 2022-07-08
Also published as: US20220381037A1; WO2021090094A1; EP4055233A1; IT201900020636A1

Abstract

A step (100) for building a staircase (500) is described, the step (100) comprising: a base frame (105), the base frame (105) being provided with a flat support surface (110) suitable to be laid and fixed on the ground (T); a footboard (205), the footboard (205) being provided with a flat walkable surface (210), the footboard (205) being hinged to the base frame (105) according to a hinge axis (X) parallel to the walkable surface (210) and to the support surface (110) of the base frame (105); and locking means adapted to lock the pedal (205) in a plurality of different angular positions about said articulation axis (X) with respect to the base frame (105).

Description

Step for modular staircases and relative construction method

Technical Field

The present invention relates to pre-built steps for building stairs on inclined ground, as well as to stairs built with said steps and a method of building said stairs.

Prior Art

The construction of stairs on a sloping ground, such as an undulating hill, a slope or any other slope, generally comprises excavating the ground and constructing a set of steps superimposed on each other in the excavation.

The steps may be constructed of any purpose-suited material, such as wood, stone, masonry, or cement.

However, digging and building steps on site makes building these stairways a relatively complex, time consuming and expensive activity.

In many cases, the complexity, time and cost associated with building stairs may be inadequate, such as when the stairs are primarily functional for purposes and/or are not required to be of significant aesthetic quality.

Disclosure of the invention

In view of the above, it is an object of the present invention to allow steps to be built on sloping ground in a simple, quick and rather cost-effective manner.

Another object of the invention is to make a staircase without having to significantly modify the structure of the ground on which it is to be built.

A further object is to build staircases which can be dismantled and reassembled elsewhere.

These and other objects are achieved thanks to the characteristics of the invention as set forth in the independent claims. The dependent claims outline preferred and/or explicitly advantageous aspects of the invention, but are not strictly necessary for the realization of the invention.

In particular, embodiments of the present invention provide a step for building a staircase, the step comprising:

a base frame provided with a flat support surface adapted to be laid and fixed on the ground,

-a footboard provided with a flat walkable surface, the footboard being hinged to the base frame according to a hinge axis parallel to the walkable surface and to the support surface of the base frame, and

locking means adapted to lock the step in a plurality of different angular positions about said hinge axis with respect to the base frame.

Thanks to this solution, the steps can be effectively used as modular elements for the quick, easy and cost-effective construction of stairs.

In fact, the supporting surface of the base frame can be laid and fixed effectively on any sloping ground without having to perform preliminary digging, but only paying attention to arranging the hinge axis in a horizontal manner.

At this point, by suitably adjusting the mutual angular position between the base frame and the tread with respect to said articulation axis, it is advantageously possible to vary the orientation of the walkable surface according to the slope of the ground, ensuring that the walkable surface is always substantially horizontal.

After locking the tread in this angular position, the first step of the staircase is arranged to allow a person to easily and safely ride on and off the sloping ground.

The staircase may be enlarged by arranging a second step similar to (e.g. identical to) the first step on the sloping ground and in the same way as described above.

The second step may be positioned above or below the first step such that the hinge axes of the two steps are parallel to but spaced apart from each other, and preferably, although not necessarily, such that the walkable surfaces of the two steps are aligned in the direction of maximum slope of the inclined ground.

In the same way, a third similar (e.g. identical) step may be added to the previous step, and so on, until a staircase of the desired length is obtained.

Thus, as is clear from what has been set forth above, thanks to the use of one or more steps according to the invention, it is advantageously possible to quickly build modular stairways on sloping ground without having to carry out extensive and expensive ground excavation operations.

These steps are also advantageous because they can be disassembled and reassembled multiple times, for example, to move stairs to other ground or to build other stairs.

According to an aspect of the invention, the means for locking the step may comprise at least a connection element suitable for rigidly connecting the primary coupling portion of the base frame to the secondary coupling portion of the pedal, both said primary coupling portion and said secondary coupling portion being spaced from the articulation axis.

This aspect of the invention provides a very simple and effective solution to lock the step tread in a preset position angled with respect to the base frame.

Another aspect of the invention provides that the base frame may comprise a plurality of distinct primary coupling portions spaced from the hinge axis, and the connecting element is adapted to rigidly connect the secondary coupling portion with any one of said primary coupling portions.

Thereby, the connecting element itself can effectively be used for locking the step tread in a plurality of different angular positions relative to the base frame.

In particular, the connecting element may be fixed to the secondary coupling portion by means of a hinged joint (such as a bolt) to define a hinge axis parallel to and spaced apart from the hinge axis.

Thanks to this solution, it is possible to modify the inclination of the tread with respect to the base frame without completely disassembling the connecting element, but simply rotating the connecting element with respect to the secondary coupling portion until it reaches an inclination that makes it possible to connect it to a different primary coupling portion.

Additionally or alternatively to the above, the pedal may comprise a plurality of secondary coupling portions spaced from the hinge axis, and the connecting element may be adapted to rigidly connect the primary coupling portion with any one of said secondary coupling portions.

This solution also allows to lock the step of the step in a plurality of different angular positions with respect to the base frame, using the same connecting element.

In this case, the connecting element may also be fixed to the main coupling portion by means of a hinged joint (for example by means of a bolt) to define a hinge axis parallel to and spaced apart from the hinge axis.

Thus, the inclination of the footplate with respect to the base frame can be modified without completely removing the connecting element, but simply rotating the connecting element with respect to the primary coupling portion until the connecting element reaches an inclination that allows the connecting element to be connected to a different secondary coupling portion.

In order to increase the number of angular positions that can be obtained, it is in any case preferred that the base frame can comprise a plurality of distinct primary coupling portions spaced from the articulation axis, the pedal can comprise a plurality of distinct secondary coupling portions spaced from the articulation axis, and the connecting element is adapted to rigidly connect any one of said primary coupling portions to any one of said secondary coupling portions.

According to an aspect of the invention, the locking means may comprise at least two of the above-mentioned connecting elements, which may be spaced apart from each other in a direction parallel to the hinge axis.

Thanks to this solution, it is advantageously possible to increase the rigidity of the connection between the base frame and the tread, making the step more stable and safer.

Another aspect of the invention provides that each connecting element may be configured as a rod (or tip) having an end connectable to the primary coupling portion and an opposite end connectable to the secondary coupling portion at the same time.

This aspect of the invention provides a particularly simple and effective solution for building the connecting element.

According to another aspect of the invention, the base frame may comprise one or more first through holes, each of which is adapted to receive an anchoring peg (anchoring peg) adapted to be driven into the ground by passing through said first through hole.

Therefore, the base frame can be stably fixed to the ground with ease and speediness.

Another aspect of the invention provides that the base frame may comprise one or more second through holes, each of which is adapted to overlie a corresponding first through hole of another similar (e.g. identical) step to receive an identical anchoring bolt. Thanks to this solution, each anchoring bolt not only allows to stably fix both steps to the ground at the same time, but also to connect them to each other, keeping them at a preset distance, thus contributing to the construction of a more stable and safer staircase.

According to another aspect of the invention, a step tread may include a plate-like member providing a walkable surface and a perimeter frame supporting and surrounding the plate-like member.

Thanks to this solution, it is advantageously possible to build different models of steps simply and cost-effectively, for example to produce plate-like elements each time with a different finish and/or material (such as metal, wood, plastic, cement or stone). Another embodiment of the invention provides a modular staircase comprising a plurality of steps, each having the characteristics highlighted above, mutually connected and arranged so that the respective hinge axes are parallel and spaced apart from each other.

A further embodiment of the invention finally provides a method for building a staircase, comprising the steps of:

prearranging a plurality of steps, each having the characteristics highlighted above,

-placing the steps at different heights on an inclined ground, ensuring that the support surfaces of the steps lay on the ground and that the hinge axes are horizontal, parallel and spaced apart from each other,

-fixing the base frame of each step to the ground,

positioning the tread of each step with respect to the corresponding base frame by rotating the tread of each step about the respective hinge axis so that the respective walkable surface is arranged substantially horizontal,

-locking the step of each step to the corresponding base frame so as to prevent mutual rotation about the respective articulation axis.

This embodiment takes advantage of the innovative characteristics of the steps described above and allows to build stairs in an extremely simple and quick manner. Obviously, it is not required that all steps be performed exactly in the order suggested above. For example, if the ground slope is known, the inclination of the pedals can be adjusted and locked before the base frame is fixed to the ground itself.

An aspect of this last embodiment of the invention provides that the base frame of each step may comprise one or more second through holes, and fixing the step base frame to the ground may comprise the steps of:

-superimposing each second through hole of the base frame of a step onto a corresponding first through hole of another step, and

-driving an anchoring bolt into the ground by passing the anchoring bolt through both the first and second through holes.

As previously mentioned, this aspect of the invention not only allows to fix the steps to the ground, but also to connect them to each other and to keep them at a suitable mutual distance, so that a more stable and safer staircase is obtained.

Brief Description of Drawings

Other features and advantages of the invention will become more apparent on reading the following description, given by way of non-limiting example, with the aid of the drawings shown in the attached drawings.

FIG. 1 is an isometric view of a step according to an embodiment of the invention.

Fig. 2 is a side view of the step of fig. 1.

Fig. 3 is an isometric view of a staircase made from a plurality of steps as shown in fig. 1.

Fig. 4 is a side view of the staircase of fig. 3.

Fig. 5 is an isometric view of a second staircase made from a plurality of steps as shown in fig. 1.

Fig. 6 is a side view of the staircase of fig. 5.

Detailed Description

As can be seen from the mentioned figures, the pre-built steps 100 are suitable for use as modular elements for building stairs 500 on an inclined ground T, such as an undulating hill, a slope or any other slope.

The step 100 includes a base frame 105, and the base frame 105 may be made of, for example, steel or other metallic material.

The base frame 105 has a support surface 110, which support surface 110 is substantially flat and is adapted to lay coplanar on the ground, preferably in direct contact with the ground.

In the example shown, the base frame 105 comprises a plate-like body 115, the plate-like body 115 having a lower surface defining the support surface 110 and an opposite upper surface. The plate-like body 115 may have a substantially rectangular periphery, having a front edge 125, an opposite and parallel rear edge 130, and two side edges 135 (only one of which is visible in the figures), the two side edges 135 being mutually opposite, parallel and both orthogonal to the front edge 125 and to the rear edge 130.

Although the plate-like body 115 shown in the figures is completely closed and continuous, it is not excluded that in other embodiments it may have one or more openings to lighten the structure and therefore take the shape of a frame or flat grid.

On the upper surface of the plate-like body 115, two beams 140 may be fixed, e.g. welded, oriented parallel to each other and spaced apart from each other.

For example, the beams 140 may extend with axes parallel to the side edges 135 of the plate-like body 115 and may each be fixed on a respective one of said side edges 135.

In the axial direction, each beam 140 may include one forward end 145 extending from the forward edge 125 of the plate-like body 115 and an opposite rearward end 150 extending from the rearward edge 130.

In more detail, each beam 140 may comprise one first profile 155 having a C-shaped cross-section, the first profile 155 defining a channel having a concavity directed towards the opposite part with respect to the plate-like body 115 and providing two parallel and mutually spaced side walls rising perpendicularly with respect to the plate-like body 115 and extending parallel to the longitudinal axis of the beam 140.

The first profile 155 may have a first axial end from which a flat appendage 160 projects, parallel to the plate-like body 115, the flat appendage 160 projecting from the front edge 125 of the plate-like body and defining the front end 145 of the respective beam 140.

The flat attachment 160 can be made in a single piece with the first profile 155, the first profile 155 also comprising an opposite second axial end 165, this second axial end 165 remaining positioned above the plate-like body 115.

At this second axial end 165, each beam 140 may also comprise a second profile 170, the second profile 170 extending with an axis parallel to (possibly coinciding with) the axis of the first profile 155, the second profile 170 being fixable (for example welded) to the first profile 155 to constitute the axial extension of the first profile 155.

For example, the second profile 170 may be partially inserted into the cavity defined by the first profile 155 at the second axial end 165, and may axially protrude from the second axial end 165, extending over the plate-like body 115 towards the rear edge 130.

The second profile 170 may have a substantially rectangular cross-section.

Each beam 140 may also comprise a flat attachment 180 parallel to the plate-like body 115, which flat attachment 180 extends axially from the free end of the second profile 170, projecting from the rear edge 130 of the plate-like body 115 and practically defining the rear end 150 of the beam 140.

Whatever is described above, it must be explicitly noted that in other embodiments, the beam 140 may be manufactured in a completely different manner.

In any case, at the front end 145, each beam 140 may have a first through hole 195, e.g., the first through hole 195 having an axis orthogonal with respect to the support surface 110, the first through hole 195 being adapted to receive the anchor stud 185 to secure the base frame 105 to the ground on which the base frame 105 is laid.

A first through hole 195 may be present in the planar attachment 160 of each beam 140, for example.

At the rear end 150, each beam 140 may also comprise a second through hole 190, the second through hole 190 for example having an axis orthogonal with respect to the support surface 110, the function of which will be clearly explained later on in this description.

A second through hole 190 may be present, for example, in the planar attachment 180 of each beam 140.

Even though in the example shown the first 195 and second 190 through holes are formed at opposite ends of the beam 140, it cannot be excluded that in other embodiments they may be formed in other areas of the base frame 105, for example in the plate-like body 115 or in certain attachments thereof.

In any case, it is preferred that the axes of each pair of through holes formed by a first through hole 195 and a corresponding second through hole 190 are orthogonal to the support surface 110 and spaced from each other in a plane parallel to the axis of the beam 140 (i.e. parallel to the side edge 135 of the plate-like body 115).

The step 100 further includes a tread 205, the tread 205 having and providing a flat walkable tread 210 on which a user may place a foot.

The footplate 205 is hinged to the base frame 105 to rotate with respect to the base frame about a preset hinge axis X parallel to the walkable surface 210 of the footplate 205 and the support surface 110 of the base frame 105. The pedal 205 may have a substantially rectangular shape with a first pair of opposing edges 215 parallel to the hinge axis X and a second pair of opposing edges 220 orthogonal to the hinge axis X.

The distance between the second pair of edges 220 may be substantially equal to the distance between the side edges 135 of the base frame 105, i.e., equal to the distance between the beams 140.

In more detail, the pedal 205 may comprise one or more plate-like elements 225, the plate-like elements 225 providing the walkable surface 210, and a perimeter frame or structure 230, the perimeter frame or structure 230 circumferentially supporting and surrounding said plate-like elements 225.

Each plate-like element 225 may be made of a different material, such as wood, stone, cement, metal or plastic, and may possibly be covered at least at the walkable surface 210 with a coating, for example, but not necessarily, with artificial turf or a non-slip material.

The perimeter frame 230 is preferably made of steel or other metallic material and may be fixed to each plate-like element 225 by any known system, for example by welding, snap-fitting or bolt assembly.

In the example shown, the pedals 205 and the base frame 105 can be articulated by means of a pair of articulated joints (only one visible in the figures), each of which connects the perimeter frame 230 to a respective beam 140, for example at the free end of the second profile 170.

Each articulated joint may comprise a fork 240 rigidly fixed to the perimeter frame 230 and a pin 245 (for example a bolt) having an axis coinciding with the articulation axis X, the fork 240 surrounding the second section bar 170 of the respective beam 140, the pin 245 fitting and being fastened in corresponding coaxial holes present in the fork 240 and in the second section bar 170 of the beam 140.

However, it cannot be excluded that in other embodiments the articulated joint can be made in a different way.

The step 100 finally comprises locking means able to lock the pedal 205 to the base frame 105 in a plurality of different angular positions about the hinge axis X.

These locking means may comprise two connecting elements 310, each of these two connecting elements 310 being adapted to rigidly connect a primary coupling portion 315 belonging to the base frame 105 to a secondary coupling portion 320 belonging to the pedal 205, wherein both said primary coupling portion 315 and said secondary coupling portion 320 are spaced from the hinge axis X.

The two connecting elements 310 may be spaced apart from each other in a direction parallel to the hinge axis X and may be connected to each other by a transverse support 312.

However, it is not excluded that in other embodiments the locking means may comprise only one of these connection elements 310.

In the example shown, each connecting element 310 may be configured as a rod or a spike, the connecting element 310 having an end connectable to the respective primary coupling portion 315 and an opposite end connectable to the respective secondary coupling portion 320 at the same time.

For each connecting element 310, the main coupling portion 315 may be defined in the corresponding beam 140, for example in a first profile 155 of said beam 140 adapted to receive the first connecting element 310.

In particular, the main coupling portion 315 can be defined by a pair of holes 325, the pair of holes 325 being coaxial with each other and having an axis parallel to the hinge axis X, the pair of holes 325 being present in the two side walls of the first profile 155, respectively.

The pair of holes 325 are adapted to align with corresponding holes (not visible in the figures) formed at the first end of the connecting element 310 to receive an insert pin 330 (e.g., a bolt) to enable stable fixation of the connecting element 310 to the base frame 105.

In particular, the pin 330 itself realizes a hinged joint which allows the connecting element 310 to rotate with respect to the base frame 105 about a hinge axis parallel to and spaced apart from the hinge axis X.

The secondary coupling portion 320 of each connecting element 310 may conversely be defined as a fork 335, which fork 335 may be fixed to the pedal 205 (e.g. to the perimeter frame 230) and adapted to receive the second end of the connecting unit 310.

In particular, the secondary coupling portion 320 may be defined by a pair of holes 340, the pair of holes 340 being coaxial with each other and having an axis parallel to the hinge axis X, the pair of holes 340 being provided respectively in the two side walls of the fork 335.

This pair of holes 340 is adapted to align with corresponding holes (not visible in the figures) formed at the second end of the connecting element 310 to receive an insert pin 345 (e.g., a bolt) to enable stable fixation of the connecting element 310 to the pedal 205.

In particular, this pin 345 itself also realizes a hinged joint, enabling the connecting element 310 to rotate with respect to the pedal 205 about a hinge axis parallel to and spaced apart from the hinge axis X.

However, when the two ends of the connecting element 310 are connected to the primary coupling portion 315 and the secondary coupling portion 320, respectively, simultaneously, the connecting element 310 is rigidly locked with respect to both the base 105 and the pedal 205, and therefore the base 105 and the pedal 205 are prevented from rotating about the articulation axis X and are forced to maintain a preset mutual angular position.

In any case it must be pointed out that in other embodiments the articulated joints connecting the connecting element to the primary coupling part 315 and the secondary coupling part 320 can be made in a completely different way.

In order to allow modifying the mutual angular position, for each connecting element 310, the pedal 205 may comprise at least a second secondary coupling portion 320, which is different and preferably positioned at a radial distance with respect to the articulation axis X.

The second secondary coupling portion 320 may be substantially similar to the previous secondary coupling portion, i.e. may be defined by a pair of holes 340, the pair of holes 340 being coaxial with each other and having an axis parallel to the hinge axis X, the pair of holes 340 being present respectively on the two side walls of a fork 335, the fork 335 being fixed to the pedal 205 and being adapted to receive the second end of the connection unit 310.

Thus, by removing the pin 345, the connecting element 310 can be rotated about the pin 330 and the pedal 205 can be rotated about the hinge axis X until the configuration is reached in which the holes present at the second end of the connecting element 310 are aligned with the holes 340 of the second secondary coupling portion 320, after which the pin 345 can be inserted into these holes to lock the pedal 205 and the base frame 105 in the new angular position.

Similarly, for each connecting element 310, the base frame 105 may comprise one or more further main coupling portions 315, these main coupling portions 315 being different from each other and preferably positioned at different radial distances with respect to the hinge axis X.

Each of these additional main coupling portions 315 may be similar to the previous main coupling portion 315, i.e. may be defined by a pair of holes 325, mutually coaxial and having an axis parallel to the hinge axis X, the pair of holes 325 being present in the two side walls of the first section bar 155 of the corresponding beam 140, respectively.

Thus, by removing the pin 330, the connecting element 310 can be rotated about the pin 345 and the pedal 205 can be rotated about the hinge axis X until a configuration is reached in which the hole present at the first end of the connecting element 310 is aligned with the hole 325 of one of the further main coupling portions 315, after which the pin 330 can be fitted into these holes to lock the pedal 205 and the base frame 105 in the new angular position.

To further increase the number of angular positions available, it is also possible to remove

pins

330 and 345 and hinge the elements to different primary coupling portions 315 and different secondary coupling portions 320.

It must be emphasized, however, that in order to obtain a rigid connection between the base frame 105 and the pedal 205, it is not strictly necessary for the connecting element 310 to be fixed to the primary coupling portion 315 and/or to the secondary coupling portion 320, since it is sufficient if the connecting element 310 is connected to said primary coupling portion 315 and said secondary coupling portion 320 in such a way as to be locked to said primary coupling portion 315 and said secondary coupling portion 320 at least at the same time as the connection.

Thus, for example, the connecting element 310 may be secured to the primary coupling portion 315 and snap-fit to the secondary coupling portion 320, provided that such snap-fit (when achieved) allows for locking the connecting element 310 to the secondary coupling portion 320 in any event.

Similarly, the connecting element 310 may be fixed to the secondary coupling portion 320 and simply snap-fit to the primary coupling portion 315, as long as such snap-fit (when achieved) allows to lock the connecting element 310 to the primary coupling portion 315 in any case.

In some embodiments, the connecting element 310 may even be a completely separate component from the base frame 105 and the pedal 205, and simply snap-fit to both the primary coupling portion 315 and the secondary coupling portion 320, as long as the connecting element 310 is in any case locked to said primary coupling portion 315 and secondary coupling portion 320 at least when both snap-fits are achieved at the same time.

As shown in fig. 3 to 6, in order to construct the staircase 500 on the inclined ground T, a plurality of steps 100 having the aforementioned features may be used.

These steps 100 can be laid directly at different heights on an inclined ground T, ensuring that their articulation axes X are parallel and horizontal, and preferably, though not necessarily, that the walkable surfaces 210 of the steps 100 are aligned along the direction of maximum slope of the ground T.

In particular, the steps 100 may be arranged such that the second through hole 190 of each step 100 overlaps the first through hole 195 of an adjacent step 100.

In the example shown, the flat attachment 180 of each step 100 may be superimposed on the flat attachment 160 of an adjacent step 100 (see details of fig. 4 and 6) to achieve this effect.

Thus, the step 100 may simply be secured to the ground using a plurality of anchor bolts 285, each of which is adapted to be driven into the ground by passing it through the second through hole 190 of the step 100 and the corresponding first through hole 195 of an adjacent step 100.

Thus, each anchoring bolt 285 is able to simultaneously secure two steps 100 to the ground and interconnect two steps 100, ensuring that two steps 100 remain at a preset mutual distance and increasing the security of the staircase 500.

Once the step 100 has been fixed, the pedal 205 can be rotated about the respective articulation axis X until the walkable surface 210 is arranged substantially horizontally and facing upwards, and is finally locked in the position as previously described.

It has to be noted that the above-mentioned assembly steps do not necessarily need to be performed in the suggested order.

For example, if the ground slope T is known, the inclination of the step 205 may be adjusted and locked prior to placing and securing the step 100 to the ground T.

Further, the staircase 500 may be constructed by placing and fixing the steps 100 on the ground one at a time.

In any case, thanks to this solution, it is advantageously possible to build on an inclined ground T a staircase 500 formed by a plurality of steps 100 connected to each other, with a rather simple, quick operation and without having to carry out a large and expensive operation in order to prepare the ground T.

By varying the number of steps 100 used, it is further advantageous to build stairs 500 of any length as desired.

The steps 100 are also advantageous in that they can be disassembled and assembled multiple times, for example to move the stairs 500 onto other ground or to build other stairs 500.

It is clear that a person skilled in the art can make several technical application changes to what has been described above without departing from the scope of the invention as claimed below.

Claims

1. A step (100) for constructing a staircase (500), the step (100) comprising:

-a base frame (105), said base frame (105) being provided with a flat support surface (110) adapted to be laid and fixed on the ground (T),

-a pedal (205), said pedal (205) having a flat walkable surface (210), said walkable surface (210) being hinged to said base frame (105) according to a hinge axis (X) parallel to said walkable surface (210) and to said support surface (110) of said base frame (105), and

-locking means adapted to lock said pedal (205) in a plurality of different angular positions about said articulation axis (X) with respect to said base frame (105).

2. Step (100) according to claim 1, wherein the locking means comprise at least one connecting element (310), the connecting element (310) being suitable for rigidly connecting a primary coupling portion (315) of the base frame (105) to a secondary coupling portion (320) of the step (205), the primary coupling portion (315) and the secondary coupling portion (320) each being spaced apart from the hinge axis (X).

3. The step (100) according to claim 2, wherein the base frame (105) comprises a plurality of distinct primary coupling portions (315) spaced apart from the hinge axis (X), and the connecting element (310) is adapted to rigidly connect the secondary coupling portion (320) with any one of the primary coupling portions (315).

4. The step (100) according to claim 3, wherein the connecting element (310) is fixable to the secondary coupling portion (320) by means of a hinged joint defining a hinge axis parallel and spaced with respect to the hinge axis (X).

5. Step (100) according to any one of claims 2 to 4, wherein the step (205) comprises a plurality of secondary coupling portions (320) spaced apart from the hinge axis (X), and the connecting element (310) is adapted to rigidly connect the primary coupling portion (315) with any one of the secondary coupling portions (320).

6. The step (100) according to claim 5, wherein the connecting element (310) is fixable to the main coupling portion (315) by means of a hinged joint defining a hinge axis parallel and spaced with respect to a hinge axis (X).

7. The step (100) according to any one of the preceding claims, wherein the base frame (105) comprises one or more first through holes (195), each of the first through holes (195) being adapted to hold an anchoring bolt (185), the anchoring bolt (185) being adapted to be driven into the ground (T) by passing through the first through hole (195).

8. The step (100) according to claim 7, wherein the base frame (105) comprises one or more second through holes (190), each of the second through holes (190) being adapted to be superimposed on a corresponding first through hole (195) of another step (100) to hold one and the same anchoring stud (185).

9. A modular staircase (500) comprising a plurality of steps (100) according to any one of the preceding claims, said plurality of steps (100) being mutually connected and arranged with their respective hinge axes (X) parallel and spaced apart from each other.

10. A method of constructing a staircase (500), comprising the steps of:

-prearranging a plurality of steps (100) according to any one of claims 1-8,

-placing the steps (100) at different heights on an inclined ground (T), ensuring that the support surfaces (110) of the steps (100) are laid on the ground (T) and that the articulation axes (X) are horizontal, parallel and mutually spaced apart,

-fixing the base frame (105) of each step (100) to the ground (T),

-positioning the tread (205) of each step (100) with respect to the corresponding base frame (105) by rotating the tread (205) of each step (100) about the respective articulation axis (X) so that the respective walkable surface (210) is arranged substantially horizontal,

-locking the step (205) of each step (100) to the corresponding base frame (105) so as to prevent mutual rotation about the respective articulation axis (X).