The bottom side rail is used welded with the front and rear corner casting. The bottom side rail is rolling formed. 2pcs are used for one container build.

C-shaped beam: Suitable for standard Marine containers (such as 20/40-foot dry cargo containers).Additional reinforcing ribs or anti-collision plates (such as corrugated plates) are needed to enhance the impact resistance.

Size:4.5X50X162X30X5702mm

Double Z-shaped beams: More suitable for structures with high loads or large slopes (such as special boxes). The beveled edge design can effectively disperse the lateral impact force and reduce the risk of welding cracking

Size:4.5X50X155X30X5702

Standard material:Weathering steel (SPA-H/CORTEN steel)

Characteristics: Contains corrosion-resistant elements such as copper and nickel, with better weather resistance than ordinary steel, and salt spray test duration ≥500 hours.
Application: Standard Marine containers (20/40 feet dry cargo containers)
Advantages: Low cost, mature technology, suitable for C-shaped and double Z-shaped beams

Special materials:Aluminum alloy

Characteristics: Lightweight (density 2.7g/cm³), yield strength 200-300MPa, corrosion-resistant but with relatively weak bending resistance
Application: Lightweight demand scenarios such as refrigerated containers and prefabricated houses, which require enhanced structural design