Durability of Galvanized Steel Framing in Residential Buildings

Summary of a ten year report

produced by NAHB Research Center, a subsidiary

of the National Association of Home Builders (NAHB) in the US and sponsored by International Zinc Association

OVERVIEW

Durability of Galvanized Steel Framing in Residential Buildings was a study commissioned by the International Zinc Association (IZA) that measured actual zinc and zinc-alloy coating corrosion rates of steel framing samples in four different home environments in the US and Canada over a ten year period. The NAHB Research Center was the research contractor.

TABLE 2 – SAMPLE COATING CHARACTERISTICS

 

 

Material

 

Coating DesignationA

(Metric [Inch-Pound])

Density of Coating (g/cm3)Coating Mass of Test MaterialB (g/m2)Coating ThicknessC (microns)

Galvanize 1

Z180 [G60]7.1427338

Galvanize 2

Z180 [G60]7.14206

29

GalfanZGF275 [ZF90]6.84315

46

Galvalume 1AZM180 [AZ60]3.75227

60

Galvalume 2AZM150 [AZ50]3.75168

45

 

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