Hot-dip metal coating method and support roll in hot dipping metal bath

PURPOSE:To improve a hot-dip metal coating method and a support roll in the hot dipping metal bath. CONSTITUTION:This invention is related to the hot-dip metal coating method and the support roll 4 therefor, in which the surface roughness Ra of the roll is made to be 2.0-8.0mum and by this roll 4, a steel strip 1 is supported in the hot dipping bath. By this method, scratch and spot mark (flaw) on the hot dipping steel strip can be prevented.