The studying of material and structural properties of wooden and steel truss systems and evaluation over a construction example

Wood systems have widespread applications as an alternative to concrete and steel systems in the world, especially in the North America and Europe. Most of the applications in our national construction sector are concrete and steel systems, so the lack of wood construction system applications can be easily recognized by rare application examples, lock of qualified labors and limited variety of application materials sold in market. In capabilities of regulations on wood construction applications and unfamiliarity of architects and civil engineers to wood construction applications characteristics can be determined by further research. Extended knowledge on wood products and proper arrangement on regulations and increased interest in wood construction applications will blow up wood industry production providing wood construction applications as an alternative to concrete and steel construction applications. In this research thesis, material and system properties of wood and steel construction are studied and compared. Reason, coverage and the presentation method of the research is introduced in the first chapter of the thesis. In the second chapter of the thesis, physical, chemical, mechanical, ecological and visual properties of wood materials are introduced. In the third chapter of the thesis, history, forms, system properties, design criteria, production and application of wooden trusses are studied. In the third chapter basic characteristics of steel and steel truss systems are studied. Firstly material and systems properties of wooden and steel truss are compared in the fifth chapter. Then static, cost, truss weight and cross-section calculations of wood and steel truss systems are made and compared by considering an example structure with 15 meters of space. In the conclusion and suggestions part of the thesis , extracted results are mentioned and defects of wood construction regulations and town planning codes are mentioned. Keywords: Wood, steel, truss system, mechanical properties, physical properties