Sheet Metal

• Most common sheet metal is 29 ga, with a little less in 26 ga (barn roof, siding, etc). Galvalume appears to be galvanized with ZA alloy (55% Al, 45% Zn). [1]
• Galvalume - last 2x that of galvanized only? [2]. Galvalume regularly lasts 60+ years. [3]. BS alert apparently, as galvalume was introduced only 50 years ago.
• Pro-rib standard at Menards is 29 ga [4]
• Typical metal brake does 29 ga [5]
• Van mark $2k - 26 ga [6]

18 gauge

• It is 1 mm [[7]]

Links

• Fasteners
• Metal Coil