Análise comparativa de custos entre lajes maciças de concreto armado e lajes de vigotas pré-fabricadas treliçadas em edifícios de até oito pavimentos

Abstract

This study bring informations about the constructive systems of reinforced solid concrete slab and pre-cast slab with trussed joists, with a comparative of execution costs of each slab. Starting with a brief history of reinforced concrete and pre-cast concrete, the paper that slabs play in a structure, the definition of reinforced concrete slab, it’s current national technical standards, construction process and advantages and disadvantages. In the same way, this informations are presented for pre-cast slab with trussed joists. In sequence is explained how the costs compositions, quantification of services and inputs were developed, based on the National System of Cost and Indices of Civil Construction (SINAPI). In possession of this compositions, were elaborated comparative graphics and tables of the two systems, when it was possible to verify that the reinforced concrete slab are more economical than the pre-cast slab with trussed joists in both proposed project situations.