Composite slabs are made up of:

• Corrugated sheet steel profile (support sheet), the indentations of which allow it to provide support to the concrete.
• Anti-fracture mesh, which is positioned in a similar manner to when employed for solid slabs and the objective of which is the prevention of fractures provoked by retraction and temperature.
• Negative Framework, which is installed in the upper section of the slab and centred in the indentations. Its purpose it to absorb the tensile stresses generated in the adjacent slabs’ supports.
• Fire-resistance framework, which installed in the same way as the negative framework but in the lower side of the indentations. This is a positive framework that is installed to ensure that the slab’s fire-resistance complies with the project’s specifications.
• Concrete, which is poured directly onto the composite slab.