We now know that the earliest records of specific structural forms are palace structure, hall structure, and cluster angle beam structure recorded in the Yingzao Fashi in Song dynasty.
The rafters and the posts are regular and aligned but the position of the collar beams is progressively shifted — to sustain the various stresses: triangulation or cantilever beam.
The rafters and the posts are regular and aligned but the position of the collar beams is progressively shifted — to sustain the various stresses: triangulation or cantilever beam.