What is the name of the beam in the corridor of ancient buildings?

The beams in the corridor of ancient buildings are called Baotou beam, sparrow replacement, beam head (three forks) and eaves rafters.

Covered passages in ancient buildings in China become corridors, including cloisters and verandahs. The basic function of the corridor is to shade the sun, prevent rain and let people have a rest. Gallery is an important part of ancient architectural modeling in China. As an internal and external transition space, the corridor under the eaves of the palace is an important means to form the virtual and real change and rhythm of architectural form. The cloisters around the courtyard play an important role in beautifying the pattern and volume of the courtyard space, which can cause different effects such as solemnity, liveliness, openness, profundity, occlusion and connectivity. The veranda in the garden mainly plays the role of dividing scenic spots, causing various spatial changes, increasing the depth of field and guiding the best viewing route.