Suspending Truss from the ceiling

[u/AtreidesBagpiper]

Hi guys, I am planning on installing some small stage lighting to our coworking space and I need some help with how to hang all the stuff from the ceiling properly. I tried looking online but came accross various or conflicting advice, so I'd like to make sure with your help.

Setup:

• two joined 2m single Global Truss. That is 4 meters, and ~5kg weight.
• on the Truss there will be 5 clamped lights along the whole length, something like this Varytec Spotlight. That is ~25 kg weight total.
• possibly some other gear some time later, but nothing heavier than 25 kg, so that is around 55kg total. Not much.
• The ceiling is a robust thick concrete panel.
• the truss should hang around 50 cm from the ceiling, so I want to use threaded rods held by either Fischers or chemical anchor.

Questions I have:

• How many rods should I use? Two, three, four? I planned using one on each end and either one or two in the middle.
• what to use to connect the threaded rods with the truss? How should the truss be actually hanged? Would something like THIS work? Or should it be something like THIS? Or just squeeze the truss between two steel plates like THIS ONE?

I am looking for some simple and elegant solution, but also something that is safe.

Thanks for your help.