A highly parametric bleachers object.

Object parameters include:

Bleachers 2
> choose materials for frame, seat, tread edge, and aisle.
> set number of sections
> set number of seating rows
> extra rear row on or off
> number of end aisles (0-2)
> section width
> aisle width
> riser height
> row depth
> seat height
> seat depth
> tread edges on or off
> mid step on or off
depth of mid step

Compatibility: ArchiCad 7.0 and up