Using Alternative Timber in Parallel Flanges Truss Structures for Steel Roof - Slope 20º, with Spans between 16 to 26 Meters

Timber is part of society’s evolutionary process. It presents several utilities because it is versatile and easy to apply. However, it is often extracted incorrectly from nature and used in inappropriate ways. In civil construction it is predominantly applied temporarily and, when it has structural purpose, it is used without knowledge about its properties and absence of structural projects. Thus, this research aims to assess the viability of employing not so usual species, with class resistance C-20 and C-30, in its usage as component structural element of industrial sheds with truss structures for roof (parallel flange) “Howe” type (20º inclination - steel roof tile); span 16, 18, 20, 22, 24 and 26 meters; typologies of edification lateral openings - 1:1, 2:1, 6:1 and opened. Therefore, it was determined the ratio between timber volume (m³) and constructed area (m²) according to NBR 7190:1997 standards, making it possible to verify the applicability of C-20 and C-30 species to industrial sheds typology determined in this research.