product feature ：

1. Double-webbed corrugated H-steel, with concrete cast in the middle cavity and pre-stressed steel strands inside
2. No formwork, no shoring, replaces reinforcement, excellent fire resistance
3. Cost: Compared to the same volume of precast concrete beams, the self-weight is reduced by 80%, and smaller tonnage cranes (tower cranes) can be used for hoisting, thus reducing the overall project cost.