How much weight can a Source Four C-Clamp carry?
Many of our fixtures ship with a C-clamp (7060A2009) to mount the fixture in the normal theatrical manner from a length of Schedule 40 1.5" ID (2" OD) pipe. We are occasionally asked about the load rating of this clamp.
There is no load rating for this part as an individual assembly. It is sold as part of the top-level Source Four fixture assembly or as a Source Four fixture accessory. It has been tested by UL as a safe hanging device for a Source Four and is covered in our UL 1573 rating for stage and studio lighting fixtures. In other words, UL says it is a safe way to hang a Source Four, but it is not independently-rated and is not sold as a rigging/load-bearing device for any other purpose.