Modular auditorium and method for assembling a modular auditorium

1. A method for assembling a modular auditorium comprising:

providing a plurality of nominal inventory portions, each nominal inventory portions comprising:

a prefabricated base portion; and

a prefabricated tier section for assembly to the base portion;

positioning the prefabricated base portion on a ground surface of a public performance space;

fastening the prefabricated tier section to the base portion to form a self supporting modular auditorium structure that does not require lateral support from a building structure other than the ground surface; and

wherein the tier section includes a first floor portion and a second floor portion cantilevered from opposed regions of a longitudinal beam and the first floor portion and the second floor portion are non-movable relative to the base portion.

2. The method of claim 1 , wherein the ground surface is a prepared ground surface.

3. The method of claim 1 , wherein the ground surface is a man-made surface.

4. The method of claim 1 , wherein the prefabricated tier section includes a tier floor having corresponding floor portions that are cantilevered from the longitudinal beam.

5. The method of claim 1 , wherein the first floor portion, and the second floor portion include an interface for accommodating a chair and for lifting the at least one tier section.

6. The method of claim 1 , wherein the prefabricated base portion includes a base portion vertical beam and the prefabricated tier section includes a tier section vertical beam.

7. The method of claim 6 , wherein the fastening includes fastening the base portion vertical beam to the tier section vertical beam.

8. The method of claim 7 , wherein flange extensions secure the base portion vertical beam to the tier section vertical beam end-to-end without welding.

9. A modular auditorium comprising:

a plurality of nominal inventory portions for positioning on a ground surface of a public performance space, each nominal inventory portions comprising:

a prefabricated base portion; and

a prefabricated tier section for assembly to the prefabricated base portion;

wherein the modular auditorium, when assembled, is self supporting and does not require lateral support from a building structure other than the ground surface;

further comprising a back wall constructed with passageways for providing electrical wiring, and conveying ventilation air and providing egress/ingress for spectators to each prefabricated tier section.

10. The modular auditorium of claim 9 , wherein the prefabricated tier section includes a tier floor having corresponding floor portions that are cantilevered from a longitudinal beam.

11. The modular auditorium of claim 10 , wherein the tier section includes a first floor portion and a second floor portion cantilevered from opposed regions of the longitudinal beam.

12. The modular auditorium of claim 11 , wherein the first floor portion, and the second floor portion include an interface for accommodating a chair and for lifting the at least one tier section.

13. The modular auditorium of claim 11 , wherein the first floor portion and the second floor portion are non-movable relative to the base portion.

14. The modular auditorium of claim 9 , wherein the prefabricated base portion includes a base portion vertical beam and the prefabricated tier section includes a tier section vertical beam.

15. The modular auditorium of claim 9 , further comprising flange extensions arranged and disposed to secure the base portion vertical beam to the tier section vertical beam end-to-end without welding.

16. The modular auditorium of claim 9 , wherein each nominal inventory portion is configured to be transportable and positioned for assembly with other nominal inventory portions by a forklift machine.

17. The modular auditorium of claim 9 , wherein prefabricated tier section includes seats and handrails.