About this 3D model
Designed some clamps to fit on 1.5" joist for holding wires. It wont hold a lot of weight but the will work for a fiew wires. I used it to temporarily get some ethernet cables up and out of the way. Recomend sanding the inside edges with some rough grit sand paper so it will grip better. One file has a 4mm hole in it for adding a screw or nail if youd like. it should work fine but is untested.