POSMAC (POSCO MagnesiumAluminum alloy Coating) is a high-performance steel product coated with a Zn-Mg-Al alloy that provides superior corrosion resistance compared to standard galvanized steel.
A POSMAC Structure Channel refers to a structural channel member (C-channel) fabricated from POSMAC-coated steel. It is commonly used in construction and industrial applications where long-term durability, strength, and resistance to harsh environments are required.
The ZnMgAl alloy coating provides 510 better corrosion resistance than standard galvanization.
Ideal for coastal, industrial, and high-moisture environments.
Manufactured as cold-formed C-channels or U-channels.
Suitable for load-bearing framing applications.
POSMACs surface is harder than typical galvanized steel, giving better scratch resistance and longer life.
Reduced maintenance due to strong self-healing corrosion behavior.
High strength-to-weight ratio allows efficient structural designs.
Solar panel mounting structures
Greenhouse frames
Industrial equipment frames
HVAC support channels
Cable tray supports
Construction framing systems
Agricultural facilities
Thickness: 1.63.2 mm
Width: 41 mm, 52 mm, 75 mm, 100 mm (varies by profile)
Coating weight: 90275 g/m (ZnMgAl alloy)
Material grade: Usually based on high-strength POSMAC-coated steel
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