Estudo comparativo de custos de uma edificação com diferentes sistemas de laje

Abstract

This paper contemplates a study on the quantity of materials and prices to build the superstructure of a reinforced concrete building, considering systems with conventional slabs, one-way precast lattice-reinforced joists with EPS filling and two-way waffle slabs with reusable formwork. The models were analyzed with a software, which generated the quantities of materials for each case. These quantities were priced according to the SINAPI's tables, resulting in the partial and total costs of the analysed systems. Comparisons of the quantity of materials and costs among the cases were made with these results, looking forward to demonstrate the implications of the choices of the slab system. Charts were generated for a better understeading of the paper. In addition, this works presents material consumption indexes that can be used to budget similar structures. The system which presented the lower cost was the one that used reusable formwork to create the ribs, followed by the model that used pre-cast joists.