Estrutura metálica para cobertura em telha cerâmica: procedimento executivo, análise estrutural e custos

Abstract

With the development of civil construction new techniques and methods have been applied, and with this there is a need to evaluate their performance and efficiency. Such methods have as main objective to improve productivity and decrease expenses. One of the materials that is being widely applied is steel for residential structures to replace wooden profiles. The referred work seeks to analyze the method used by a construction company in the city of São Gonçalo do Amarante - RN, called in this work by the Construtora pseudonym, which consists of the use of folded steel structure to support the ceramic tiles of the common colonial type. The work seeks to evaluate the structural response of the profiles involved based on the norms in force, since the Construtora company does not have the structural project or calculation memorial. The cost of the steel structure will also be evaluated and compared to the value of a similar wooden structure according to the values provided in the Seinfra table. The data collection was done by project analysis, employee testimonies and also by visits during pre-assembly and completion periods. From the results obtained we can observe that the profiles involved in the steel structure showed mostly good structural response, only the profile related to the banzo showed resistance to lateral instability by torsion lower than requested when verified by the NBR 14762 of 2010 standard, this being the element with the largest gaps unlocked. As for the cost, when comparing the value spent with the steel structure in the enterprise to the value of a similar wooden structure cover, the steel cover proved to be cheaper, this difference being 34,82%. However, the coverage presents some difficulties, being the main ones the distance of the suppliers of the profiles and the labor, which in a certain way needs to be trained at the beginning. The main advantages are the execution time that takes 50% less in relation to the assembly of a roof in wood and the lightness of the structure that decreases the requests and effort.