What is 1-5/8 inch strut channel?

1-5/8 inch strut channel is a common imperial strut size used in electrical, mechanical and construction support systems.
Typical forms include 1-5/8 × 1-5/8 inch channel and 1-5/8 × 13/16 inch shallow channel. Professional distributors often list these channels for trapeze supports, seismic bracing, framing and suspension applications.