Steel plate (bottom plate)

　　Cold-rolled steel sheet or galvanized steel sheet is typically used as the bottom formwork and load-bearing component of floor slabs.

　　Common materials include carbon structural steels such as Q235B or Q355B, which offer excellent strength and formability.

　　The surface is often galvanized (e.g., by hot-dip galvanizing) to enhance corrosion resistance.

　　Steel truss

　　A triangular or trapezoidal truss structure is formed by upper-chord reinforcement, lower-chord reinforcement, and web reinforcement through welding or tying.

　　Reinforcing steel typically uses hot-rolled ribbed bars such as HRB400 or HRB500, which exhibit high yield strength.

　　Truss structures can effectively enhance the flexural capacity and stiffness of floor slabs.

　　Concrete (pouring layer)

　　Concrete is poured over the truss deck to form an integral floor slab.

　　Concrete grades typically range from C25 to C40, with the specific grade determined according to design requirements.

　　Concrete works in concert with steel plates and reinforcing steel to ensure the structural integrity of the structure.

　　Connectors and Auxiliary Materials

　　These include shear studs (used to connect steel beams to floor decking and enhance shear resistance), welding consumables such as electrodes or welding wire, and fasteners like bolts.

　　Sometimes, crack‑resistant fibers or interface‑treatment agents are also added to enhance the bond between the concrete and the steel plate.

　　Anti-corrosion and Fireproof Materials (Optional)

　　According to the project requirements, fire‑retardant or anti‑corrosion coatings may be applied to the steel plate surface to meet the required fire‑resistance rating and durability specifications.