Thank you for the clarification. I wasn't sure if the "equipment" was additional to the access points or if the access points were the equipment. Being just very lightweight access points, the off-the-shelf most everywhere anchoring solutions are quite broad. I'll just present a few options to help you visualize & build upon.
If you'd prefer a single attack & homogeneous look & procedure in only using the ceiling's channels, since they're everywhere. Then, I'd suggest Little L-Brackets Masonry Screwed or Masonry Bolted into the channels with a drilled hole. Due to the small amount of weight we're talking the L-Bracket's one side can be cut or slit to slip in your Loop Cable.
Drilling the holes too big or sloppy can be remedied by bigger Masonry Screws or going to the longer & drill deeper Sleeve Anchor pictured on the far right, these combinations would very closely match the method used for the Unistrut's anchoring.
The I-Beam anchors can be as simple as a Metal Rod bent around the I-Beam Ledges. Or, a Picture Frame Wire (possible scraps from your Loop Cables) tensioned between 2 of the L-brackets above, you'd just close the "L" down with pliers to a "V". Or, a variation of the below concepts.
The Unistrut's c-bar usage can of course be their nut option. Or, just a simple Plastic or Metal Wire Tie (always trim that tail off) or more Picture Hanging Wire (possible scraps from your Loop Cables) or a Bolt, Nut & Washer assembly.
But, I think those options will get it done in overly securing your Loop Hangers. If this is more than a single in-house installation you might invest in a system like this for future installations.