The open steel frame is a cold-rolled/galvanized/aluminized magnesium steel profile with an open (non-closed tubular) cross-section. It is mainly of high strength, low cost, and easy assembly. It is mostly used in photovoltaic modules, doors and windows, building templates and curtain walls.

Low cost: The price of steel is significantly lower than that of aluminum, the amount of material is small, and the cost reduction effect is obvious.

Wear resistance and manufacture resistance: High surface hardness, not easy to scratch during transportation and installation, suitable for extensive scenes such as construction sites.