Low quotient girder size

The main beam is 250 mm wide and 500 mm high, and the secondary beam is 200 mm wide and 300 mm high. According to the building code, low quotient refers to the standard size of the first and second floors of a house, that is, the main beam is 250 mm wide and 500 mm high, and the secondary beam is 200 mm wide and 300 mm high. Beam is a kind of transverse load-bearing component in traditional buildings in China, which is usually used for the roof and beam frame of houses. The history of girders can be traced back to ancient times, and the earliest girders appeared in the buildings of Shang Dynasty.