Stage rigging & suspension primary used is to support the stage-lighting system and to suspend and shift stage scenery. Stage curtains, backdrops, and heavier framed scenes pieces are example of scenery raised and lowered by the rigging.
Stage Rigging can be fix, manually operated or motorized, and serves many purposes.
There are many aspect to consider when designing a stage rigging like the total load weight allowed, secondary support structure, fix or motorized type and finally the safety of the audience and stage performers below.