Lean-to rigging apparatus for shaft installation

1. A lean-to rigging apparatus comprising:

a spanning beam having a first end, a second end, and a length measured from the first end to the second end;

a sill support structure rigidly attached to the first end of the spanning beam in a fixed position, the support structure including a first sill support member, a second sill support member, and a recess that extends between the first sill support member and the second sill support member such that the sill support structure is configured to abut a first surface in a plurality of positions;

a wall support member attached to the second end of the spanning beam and configured to abut against a second surface that is opposite the first surface; and

at least one hoist connector arranged on the spanning beam, wherein the hoist connector is configured to allow a connection to a hoist device;

wherein:

the length of the spanning beam is longer than a horizontal distance measured from the first surface to the second surface along a direction substantially perpendicular to the first surface,

the apparatus is configured to define an angle measured from the spanning beam to the direction when the sill support structure abuts the first surface and the wall support member abuts the second surface, and

the angle is one of a plurality of angles at which the spanning beam is configured to be oriented with respect to the direction, the plurality of angles corresponding to the plurality of positions of the sill support structure.

2. The lean-to rigging apparatus of claim 1 , wherein:

the apparatus is configured to be installed in a shaft, the first surface is a wall of the shaft, the second surface is a sill of the shaft, the sill including an upper portion and a lower portion,

the direction is a first direction and the upper portion is spaced from the lower portion in a second direction that is perpendicular to the first direction, and the first sill support member configured to abut against the upper portion of the sill, and the second sill support member configured to abut against the lower portion of the sill.

3. The lean-to rigging apparatus of claim 2 , wherein one or more of the first sill support member, second sill support member, and wall support member are elongate along a third direction that is direction that is perpendicular to both the first direction and the second direction.

4. The lean-to rigging apparatus of claim 2 , wherein one or more of the upper sill the first sill support member, second sill support member, and wall support member have a layer of slip resistant material or have a coating of slip resistant material.

5. The lean-to rigging apparatus of claim 2 , wherein the first and second sill support members each include a steel pipe having a substantially round cross-sectional shape.

6. The lean-to rigging apparatus of claim 5 , wherein the first and second sill support members are welded to the sill support structure.

7. The lean-to rigging apparatus of claim 5 , wherein the first and second sill support members are integrally formed with the sill support structure.

8. The lean-to rigging apparatus of claim 1 , wherein for each position in the plurality of positions of the sill support structure, the first sill support member abuts against the upper portion of the sill in a different position and the second sill support member abuts against the lower portion of the sill in a different position.

9. The lean-to rigging apparatus of claim 1 , wherein the recess prevents the sill from contacting the sill support structure at any point other than at the first and second sill support members.

10. The lean-to rigging apparatus of claim 1 , wherein the hoist connector includes a beam rigidly attached to a lower side of the spanning beam, and wherein the hoist connector further comprises one or more apertures.

11. The lean-to rigging apparatus of claim 10 , wherein the hoist connector is substantially centered between the first end and the second end of the spanning beam.

12. The lean-to rigging apparatus of claim 10 , wherein the hoist connector is connected to one or both of a hoist device and a load.

13. The lean-to rigging apparatus of claim 10 , wherein the one or more apertures comprise a plurality of apertures equally spaced along the hoist connector.

14. The lean-to rigging apparatus of claim 10 , wherein the hoist connector is integrally formed with the spanning beam such that the one or more apertures are integrally formed in the spanning beam.

15. The lean-to rigging apparatus of claim 10 , wherein the hoist connector is bolted to the spanning beam.

16. The lean-to rigging apparatus of claim 10 , wherein the hoist connector is welded to the spanning beam.

17. The lean-to rigging apparatus of claim 1 , wherein the wall support member includes a steel pipe having a substantially round cross-sectional shape.

18. The lean-to rigging apparatus of claim 17 , wherein the wall support member is welded to the spanning beam.

19. The lean-to rigging apparatus of claim 1 , wherein the wall support member is integrally formed with the sill support structure.

20. The lean-to rigging apparatus of claim 1 , wherein the spanning beam has a cross-sectional shape, the shape being one of a tube, an “I” square tube, “H” shape, “L” shape, “T” shape, “W” shape, rectangular tube, square, rectangular, circular, or channel.