3. Steel Material Thickness Material thickness of steel is referred to as Gauge (GA). Gauge is the two digit number that relates to the thickness of the steel sheet in decimal inches. The larger the Gauge number, the thinner the sheet. Example Tolerances: 26 Gauge = .016” to .020” 24 Gauge = .021” to .027” 22 Gauge = .027” to .033”
4. Steel Material Thickness Material thickness of steel is referred to as Gauge (GA). Gauge is the two digit number that relates to the thickness of the steel sheet in decimal inches. The larger the Gauge number, the thinner the sheet. Purchased Thickness: 26 Gauge = .018” 24 Gauge = .023” 22 Gauge = .0296”
17. Galvalume vs. Galvanized Moderate Marine / Rural Hot Dipped Galvanized After 18 years, G-90 Galvanized exhibits red rust Galvalume Galvalume after 23 years – No major sign of red rust.
18. Galvalume vs. Galvanized Salt Spray Corrosion Resistance With cut edges protected, the coating on Galvalume AZ50 lasts 5 to 10 times longer than the coating on G90 Hot Dipped Galvanized. Salt spray tests conducted with bare cut edges exposed, the corrosion resistance of Galvalume AZ50 is typically three to four times that of G90 HD Galvanized.
19. Galvalume vs. Galvanized Salt Spray test concerning the amount of hours to first significant rust Total # of Hours
20. Galvalume vs. Galvanized Corrosion Losses of Substrates H. D. Galvanized Galvanized 0.8 0 0.2 0.4 0.6 1 Corrosion Loss (Mils)
21. Dissimilar Metals Direct contact of steel to these metals will cause corrosion damage and deterioration of the steel. Even water run off from these metal will cause corrosion of the steel. Copper Iron Graphite Lead