Galvanizing-Roughness

Figure 3: Surface roughness is acceptable on galvanized steel, but must be smoothed by mechanical means (sanding, grinding, filing, etc.) in preparation for the application of a tie coat compatible with intumescent fire-resistive materials.
Figure 3: Surface roughness is acceptable on galvanized steel, but must be smoothed by mechanical means (sanding, grinding, filing, etc.) in preparation for the application of a tie coat compatible with intumescent fire-resistive materials.

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