What is the difference between 12 gauge, 14 gauge and 16 gauge strut channel?

12 gauge strut channel is thicker and normally used for heavier-duty support. 14 gauge strut channel is common for medium-duty installations. 16 gauge strut channel is lighter and suitable for lower-load applications.
Gauge affects load capacity, channel weight, deflection, span and cost. Buyers should also confirm the channel size, steel grade, finish, support spacing and fixing method.