Here is a conventional Cross-over clamp for EMT using standard 1/4" x 1-1/8" X 2-1/2" U-Bolts. The 3D design is at: https://www.prusaprinters.org/prints/57012-makerpipe-crossover-clamp-for-emt-using-u-bolts
I only had 3-1/2" U-Bolts hanging around..