Determinação de equações paramétricas para levantamento preliminar do custo do aço empregado na estrutura de cobertura

Abstract

A great factor that influences the decision making regarding a particular enterprise and its viability is the budget, which should be as accurate as possible, always seeking the economy allied with security. The budget engin eer can choose between several ways of budgeting, such as price research or the use of parametric methods. In order to minimize the lack of indicators related to metallic roofing structures in Brazil in the area of budgets, this work aims to propose solutions for the preliminary analyzes carried out by the budget through the elaboration of indicators and parametric equations to predict the quantity of steel used in the roofing structures depending on the area of projection of the same. In this work, 37 projects of industrial warehouses, warehouses and commercial rooms with the steel roof structure of the West region of Paraná were used. The projects have several sizes in rectangular format with their areas varying between 116.40 m2 and 4656.64 m2, width between 6.40 m and 42.80 m, and length between 11.50 m and 108.80 m. Initially the values of the constructed area, length of the profiles used, and area of the cover plates and of the rails were raised. Afterwards, graphs were generated and the linear regressions were obtained with their parametric equations, and the indices for each element of the coverage were also obtained. Only a few indicators elaborated in this work can be applied in the preliminary study of the cost of the steel used in the roofing structure, for example: kilograms of roofing sheet per square meter.