Abstract:
This study consists of a detailed analysis of the voided slabs, taking into account
the impact that these slabs have on the weight of the structure, their impact on the
environment where it is built, the cost of construction and the time that these slabs seek to
be implemented in our country. The large-span concrete slab system with internal
spherical void former Cobiax has been used in Europe for more than ten years. They are
biaxial reinforced concrete slab systems with internal spherical void former grids. This
article discusses three issues related to Cobiax flat panel systems: their shear strength,
total weight of the structure and their economic value in the context of Albania. Since the
shear resistance of the COBIAX slab requires the "loss" (or reduction) of the aggregate
interlocking, it will affect the design requirements of the reinforced concrete design code.
To make it more distinct how the building changes when reinforced concrete slabs are
replaced with voided slabs a four-story building with reinforced concrete slabs 18 cm thick
will be taken as a case study and a comparison of the load in foundation will be made.
