The technical-economic option for the use of the nervured slab in a residential-commercial building: Case study

It is noticed that civil engineering is still a very empirical science compared to other engineering. Still predominates in construction sites in Brazil, constructive methods very similar or equal to those practiced for centuries. However, increasing competition in the construction industry has made to seek more effective techniques and options with better money. As an example we have the ribbed slab, which is a relatively old constructive methodology, but is gaining popularity in the construction sector. In this article we tried to discuss the technical and economic choice of ribbed slab in the enterprise Prime Green Candeias located in Vitória da Conquista, Bahia. To obtain proper results, a literature review was conducted with relevant sources, beyond to interviews with various professionals responsible for the work. Based on these results it was found that, in fact, the main driver of choice for ribbed slab was able to meet larger spans, and verify that there is a cost savings from the elimination of concrete down the line neutral slab. However, because of the ribbed slab having a large thickness due to the ribs, this generates an increase in the ceiling height of the work, which eventually caused an extra charge.