12 Gauge Galvanized Steel Heavy duty hardware should be used when the curtain material is very heavy or when an extra safety factor is desired. The roller track is roll formed from 12 gauge hot dipped galvanized steel. You can increase your support spacing to decrease the number of support points and save installation time. The 12 gauge curves have a 2 foot 3 inch radius and a 6 inch straight section of track at each end. The following parts are stock items. Many items previously shown (e.g. ES End Stop) can be used with the heavy duty curtain hardware.