Conventional system x sifonic system: a technical-economic analysis in use in predial systems of pluvial

Abstract

ABSTRACT: Increasingly, the construction sector demands efficient solutions aligned with innovation. In Brazil, the building water systems follow the requirements of NBR 10844 / (ABNT, 1989) where the systems are designed as a free duct. The syphonic system appears as an alternative, acting as a forced conduit. In the present study, two buildings were evaluated in a city in northern Rio Grande do Sul, an industrial warehouse with a large coverage area, and a hospital building with a smaller roof. The systems of the two buildings were dimensioned with rainfall indices of 125 mm / h and 180 mm / h and respective return periods of 5 and 25 years. We also analyzed the characteristics of both regarding the construction process and operation. The acquired information of the characteristics of each one made possible a technical and economical comparison of the costs, advantages and disadvantages, considering applicability in industrial and conventional works. The survey of materials and their implementation costs for the two situations in each of the buildings was developed. The syphonic system stood out as a more complete system, easy assembly and eliminating large amounts of vertical conductors from the façades, but this resulted in a cost of 6 to 8 times the cost of the conventional system.