The construction of the beam closure section is generally divided into three ways. For the simple cantilever beam with hanging holes and the T-type rigid frame with hanging holes, the joint section is the hanging beam. For the continuous beam and the continuous T-type rigid frame, the closing section is the connection of the two beams. The third type is the construction technology of mid-span hinge section. The second type, such as Suzhou Shishan Bridge, Guangzhou Luogang Bridge; And the third type such as Taipei Guangfu Bridge and so on.