hot dipped galvanized doors

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Galvanized, G90, G-90
A simple field test can determine if a door or frame is galvanized or cold rolled steel, however this test will not determine if the steel is A60, A40 or G90. The Tech Tip can be viewed here.
The three most common steel types are cold rolled steel, galvannealed steel, and galvanized steel. Cold Rolled Steel (CRS) is suitable for most interior applications, is uncoated steel a...
Yes, Steelcraft does offer optional A60 and A40 Galvannealed, and G90 Galvanized steel on doors and frames. Galvannealed A60 and A40: A60 coating designation - optional on all doors and frame...
Galvannealed and galvanized steel are zinc coated at the steel mills and are designed for rust and corrosion resistance. Both steels are passed through a hot dip coating process for rust prevention...
CAUTION must be used in investigating this problem - In most cases, excessive field rusting of products is caused by improper storage at the jobsite. That situation must be validated prior to refus...
When rust appears, repair the affected surfaces by finish smooth, clean, treat for maximum paint adhesion, and touch up the surfaces with a direct to metal (DTM), rust inhibitive primer.
Prime or painted surfaces which have been scratched or otherwise marred during installation (including field welding) and/or cleaning must be field repaired and re-primed by the installing contractor.
During the construction cycle, spot rust is usually attributed to either material handling damage or improper storage of the material on the jobsite. The material must be repaired and repainted as ...