Quote Originally Posted by D.C. View Post
I can't find any where the investigation blamed a failure of the truss system for the accident, do you have any links to demonstrate what you mean?

****The subsequent bending forces within the support columns were too large, ****and the structure collapsed under its own weight.[6] Measurements indicated that the total weight was 70,000 pounds (32,000 kg).
Toronto the week before, there has been a few others.

The legs on self raising stage roof systems are truss on end, even with thin wall its very strong in compression, but tilted off axis , its a thin tube getting bent.

The saving is in weight, early lighting truss was steel antenna tri truss, its a lot of weight to manhandle and to hoist.

Mebbe 2D truss shape , as used by Steeldeck staging

Middlesex University steeldeck 8x4 by Rory - 3D Warehouse

again its used to reduce weight for a given strength, if weight is less of a concern apart from moving the mass of the gantry and possibly damping resonance?