Built up beam for composite beam of steel and concrete

摘要

The present invention relates to a steel plate assembly beam for a steel concrete composite beam in which one leg of an upper angle is coupled to the upper part of the side of a pair of web plates spaced apart from each other, and more particularly, it minimizes welding during manufacturing and at the same time increases the thickness of the upper angle. It is about a steel plate assembly beam for steel concrete composite beam that can be set freely and has excellent cross-sectional efficiency. The present invention steel plate assembly beam for steel concrete composite beam is filled with concrete inside to form a steel concrete composite beam, a pair of web plates spaced apart from each other; a lower flange provided at the lower portion of the web plate to connect a pair of lower portions of the web plate; and an upper angle provided in each of the upper portions of the web plate, wherein one leg is coupled to a side surface of the web plate and the other leg is bent in a direction orthogonal to the web plate; It is characterized in that it is composed of