24 gauge 20 gauge 18 gauge and 16 gauge.
G90 galvanized sheet metal weight.
Kynar galvalume steel for metal roofing and gutters.
These numbers refer to the weight mass in si units of zinc on the surface of the steel sheet in inch pound english or imperial units of measurement.
When exposed to the atmosphere pure zinc reacts with oxygen to form zinc oxide which further reacts with carbon dioxide to form zinc carbonate a dull grey fairly strong material that stops further.
Sheet steel galvanized steel stainless steel aluminum strip tubing inches gauge decimal inches weight lb ft 2 gauge decimal inches weight lb ft 2 gauge decimal inches weight lb ft 2 gauge decimal inches weight lb ft 2 gauge decimal inches 44.
26 gauge 24 gauge 20 gauge 18 gauge 16 gauge 14 gauge 1 8 and 1 4.
Designation system is given in terms such as g60 g90 etc.
That is for g90 the coating on one square foot of sheet total coating both sides of the sheet weighs a minimum of 0 90 ounces.
If equally applied to both sides of the sheet there would be a minimum of 0 45 ounces on each surface.
The galvanized sheet coating parameters relate to the total for both sides of the sheet.
Batch galvanizing coating specifications are given in weight per surface area.
16 gauge 14 gauge 1 8 and 1 4.
48 oz 24 oz 20 oz and 16 oz.
The standard product is class g90 which has 0 9 oz ft 2 of sheet total both sides or about 0 76 mils 18 µm thickness per side.