LAJES PRÉ-FABRICADAS E LAJES MACIÇAS: uma análise econômica para a cidade de Congonhal no Sul de Minas Gerais

Abstract

This work presents an economic analysis between the prefabricated slabs and the massive slabs through the SINAPI database and local field research in the city of Congonhal-MG. This is a relevant theme in the structural design phase of a residence, because the choice of the constructive method of slabs should not be based only on the designer's familiarity, but rather through technical and financial basis. The research demonstrated that the costs obtained through the SINAPI database were below the costs practiced in the city, therefore, it should not be used as the only parameter for budgets in the city. The analysis also showed that the costs for the massive slabs were about 30% more costly in relation to the costs of prefabricated slabs. In relation to the labor for the same type of slab, it was about 70% more costly, so it is a preponderant factor to be considered. It was emphasized that the choice of the best structural solution should also not be purely financial, as the cheapest solution may not be technically adequate, thus, it becomes important to know the advantages and disadvantages of each construction model. Finally, it is concluded that for small buildings in the city of Congonhal-MG, the use of prefabricated slabs is recommended.