|Truss System Before the Collapse|
|After the collapse workers assess damage.|
Also note that only three of the workers in the pictures are wearing hardhats. It is unclear, but likely, that safety shoes are not worn in this construction environment. Few workers appear to be wearing bright colored clothes, which makes it more difficult to spot staff and avoid collisions. All of these factors can contribute to further injuries.
This is particularly relevant as this Blogger is scheduled to address the China Stage Design Exhibition in Beijing on November 26th-29th to discuss the development of an Entertainment Safety Initiative similar to the US lead Event Safety Guide developed by the Event Safety Alliance.
Update: Two more pictures: