conventional assembly closed section steel watch steel coil molded concrete production Z-one pairs or steel bottom flange ( 14, welding beams b 9 to 24) to produce a permanent mold and a U-shaped upper flange (12, 22) is laid on the deck plate (7) for filling concrete. Height 300mm~600mm, thickness of 6-10mm pair Z-plant is already being produced when the height exceeds 600mm and is designated using the U-shaped. But height is not a small cross-section of more than 300mm Z-pair production has been invented new single, easy-W steel beams. ; W parties forming beams (1) of the steel coil thickness 3~6mm outside a schematic form a permanent formwork is continuously forming a W-shaped. Web shear reinforcement and the role of the reinforced concrete beam. Upper jaw plates are used across the deck plate (7) and shall bear the flexural compression during construction. The President and the lower tension member flange corresponding to the warp tension and the cog-like protrusions (5) In addition to the role of increasing the cross-sectional area of the tension member the anchor insertion purge purposes. A b-beam (9) between the top flange is welded to the President and the foundation for the passage of the width of the shear consolidated nearness role and field workers, and between the left and right web W beam and concrete slab.
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