Economic comparative analysis between latticed unidirectionial and pre-manufactured solid slabs in a four-storey building

The article aims at comparative cost analysis between two structural systems in reinforced concrete, one using solid slabs as flat elements and the other using unidirectional prefabricated ribbed slab with lattice beams. For accomplishment of case study, two structural projects of a four-storey building have been elaborated, one project being used solid slab and the other latticed prefabricated slab, taking into account all aspects of structural performance of two types of slab, making the sizing of all structural elements to be built in the most economical way possible, considering NBR 6118/2014, and among those structural elements was disregarded the calculation of foundation, because there is variable factor of soil . The results have been obtained through design of slabs, beams and pillars of the project, and subsequently a quantitative survey of materials and inputs. Through quantitative survey, a budget of two systems has been made based on unit price compositions of SINAPI (National System of Costs Survey and Civil Construction Indexes), as well as unit price references of the same. In that way, it was possible to compare two budgets related to structural systems in reinforced concrete, using solid slabs and unidirectional prefabricated ribbed slabs with lattice beams, reaching the result that differentiates cost between the two systems.