Pre-engineered Steel Construction Buildings are designed for large space needs. These structures may be easily dispatched to any part of the world. Prepared according to "design,structural,static and engineering calculations, and electricity installations and other desired reinforcements" based on the place and puspose of usage, plans of these structures are basically formed of steel carrier system and facade and roof cladding elements. It is very important to accurately calculate the loads that will affect the structure at the place of use, and to correctly analyze the carrier system. Pre-Engineered Steel Construction Buildings are used in useful heights of over 3-3,5 meters and in large spaces. Fields of usage are; warehouses, hangars,workshops,production facilities,sports facilities,shopping areas,showrooms,aircraft hangars,industrial plants and energy facilities.