A:You can choose the ones made of aluminum alloy. Aluminum alloy materials have diverse shapes, are relatively light in weight, easy to construct, have a high aesthetic level, but are relatively high in price.
Hot-dip galvanized materials have relatively high corrosion resistance, are relatively heavy in weight, have higher strength and are moderately priced.
The materials made of zinc-aluminum-magnesium are relatively inexpensive. The construction process is the same as that of hot-dip galvanized materials and they are the cheapest in price.