Análise comparativa de custos em edifícios de alvenaria estrutural com diferentes posições de aberturas de portas e janelas

Abstract

The structural mansory is one of the oldests constructive methods, however, only in the last few years this system started to mark their presence in the Market because of demand from the construction sector for more faster technologies and cost-effective solutions. The emerging of standards and technical recommendations and the development of a rational method use for sizing helped spreading the system. In that system don’t have pillars and beams supported, the mansory besides sealing she also do supporting structure. Therefore, civil engineers should develop projects that have the same openings patterns of doors and windows in all floor of the building, because their are gonna transmitted the loads. Another important fact are the position of the oppenings patterns, since they intervene directly with the structural system. So in this work presente a costs comparative for two projects with diferente oppenings patterns os doors and windows, they were previously study by Benetti (2016), using ceramic blocks froom 19 family. For the budgeting has been used two methods, detailed budget and budget for stages. Has been used the ABC curve of services and making global costs comparative and for stages, also as comparated with CUB of the month of July 2017. The difference in costs between the two projects were 0,32%. The gap of costs has not been significant because the steps of frame and fluid concrete belong on the category C of the curve, the category represents 20% of all costs. The two projects study presents the same ABC curve for both situations. The costs for square metre of construction has been R$/m² 982,44 and R$ 979,31/m² for the plants 1 and 2 respectively. Both value are cheaper than R$/m² 1204,09 the adopted CUB and the higher of then were 22,56% lower than CUB, present this way the cost-effective to the mansory system.