Loading ramp

1. A loading ramp configured to be supported between a first surface and a second surface, the loading ramp including:

a first ramp portion configured to be supported on the first surface, the first ramp portion including:

a first rail portion extending between a first end, which is supported on the first surface, and an opposing second end, the first rail portion extending along a first non-linear axis; and

at least one first tread portion slidably movable with respect to the first rail portion along the first non-linear axis such that the at least one first tread portion is removably attached to the first rail portion, the at least one first tread portion configured to support a weight when the least one first tread portion is attached to the first rail portion;

a second ramp portion attached to the first ramp portion and configured to be supported on the second surface, the second ramp portion including:

a second rail portion extending between a third end, which is attached to the second end of the first rail portion, and an opposing fourth end, which is supported on the second surface, the second rail portion extending along a second non-linear axis; and

at least one second tread portion slidably movable with respect to the second rail portion along the second non-linear axis such that the at least one second tread portion is removably attached to the second rail portion, the at least one second tread portion configured to support the weight when the at least one second tread portion is attached to the second rail portion;

wherein the at least one first tread portion defines a first tread opening into which the first rail portion is removably received when the at least one first tread portion is removably attached to the first rail portion the first tread opening bounded on all sides by sidewalls.

2. The loading ramp of claim 1 , wherein the at least one second tread portion defines a second tread opening into which the second rail portion is removably received when the at least one second tread portion is removably attached to the second rail portion.

3. The loading ramp of claim 1 , wherein the first rail portion includes a first rail and a second rail.

4. The loading ramp of claim 1 , wherein the second rail portion includes a third rail and a fourth rail.

5. The loading ramp of claim 1 , wherein the second ramp portion is movable with respect to the first ramp portion between an extended position, in which the first ramp portion is supported on the first surface and the second ramp portion is supported on the second surface, and a folded position, in which the first ramp portion and the second ramp portion are configured to nest with each other.

6. The loading ramp of claim 5 , wherein in the folded position, the first ramp portion has a matching shape to the second ramp portion.

7. The loading ramp of claim 1 , wherein the at least one first tread portion includes a first tread, which extends between a first side and a second side, and a second tread, which extends between a third side and a fourth side, the second side of the first tread adjacent to the third side of the second tread.

8. The loading ramp of claim 7 , wherein the second side of the first tread includes a first mating portion, the third side of the second tread includes a second mating portion.

9. The loading ramp of claim 8 , wherein the first mating portion of the first tread is laterally offset from the second mating portion of the second tread, the first mating portion configured to engage the second mating portion to limit movement of the first tread with respect to the second tread, the first mating portion projecting outwardly from the first tread towards the second tread a first distance, the second mating portion projecting outwardly from the second tread towards the first tread a second distance, wherein the first distance is substantially equal to the second distance.

10. A loading ramp configured to be supported between a first surface and a second surface, the loading ramp including:

a first ramp portion configured to be supported on the first surface, the first ramp portion including:

a first rail portion extending between a first end, which is supported on the first surface, and an opposing second end, the first rail portion extending along a non-linear axis; and

at least one first tread portion slidably movable with respect to the first rail portion along the first non-linear axis such that the at least one first tread portion is removably attached to the first rail portion, the at least one first tread portion configured to support a weight when the least one first tread portion is attached to the first rail portion;

a second ramp portion movably attached to the first ramp portion and configured to be supported on the second surface, the second ramp portion including:

a second rail portion extending between a third end, which is movably attached to the second end of the first rail portion, and an opposing fourth end, which is supported on the second surface, the second rail portion extending along a non-linear axis; and

at least one second tread portion slidably movable with respect to the second rail portion along the second non-linear axis such that the at least one second tread portion is removably attached to the second rail portion, the at least one second tread portion configured to support the weight when the at least one second tread portion is attached to the second rail portion;

wherein the second ramp portion is movable with respect to the first ramp portion between an extended position, in which the first ramp portion is supported on the first surface and the second ramp portion is supported on the second surface, and a folded position, in which the first ramp portion and the second ramp portion are configured to nest with each other with the first ramp portion having a substantially matching shape to the second ramp portion;

wherein the at least one first tread portion defines a first tread opening into which the first rail portion is removably received when the at least one first tread portion is removably attached to the first rail portion the first tread opening bounded on all sides by sidewalls.

11. The loading ramp of claim 10 , wherein the second surface is elevated with respect to the first surface, the second surface including a vehicle.

12. The loading ramp of claim 10 , wherein the at least one first tread portion extends between a first support side and an opposing second support side, the first support side configured to support the weight.

13. The loading ramp of claim 12 , wherein the second support side defines a first tread opening into which the first rail portion is configured to receive the first rail portion.

14. The loading ramp of claim 10 , wherein the fourth end of the second rail portion and the second surface on which the loading ramp is supported are substantially planar with respect to each other.

15. A loading ramp configured to be supported between a first surface and a second surface, the loading ramp including:

a first ramp portion configured to be supported on the first surface, the first ramp portion including:

a first rail portion extending between a first end, which is supported on the first surface, and an opposing second end, the first rail portion including a first rail; and

at least one first tread portion removably attached to the first rail of the first rail portion, the at least one first tread portion defining a first tread opening into which the first rail is removably received when the at least one first tread portion removably attached to the first rail of the first rail portion, the first tread opening bounded on a top side and a bottom side by sidewalls;

wherein the first end of the first rail portion and the first surface on which the loading ramp is supported are substantially planar with respect to each other, the first tread opening non-planar with respect to the first tread portion such that the first rail portion, when received within the first tread opening, does not intersect a plane defined by the first tread portion.

16. The loading ramp of claim 15 , wherein the at least one first tread portion includes a first tread width.

17. The loading ramp of claim 16 , wherein the first rail portion includes a first rail and a second rail, the first rail and the second rail separated a separating distance.

18. The loading ramp of claim 17 , wherein the separating distance is less than the first tread width.