They are both three metres taller than the corridor.The two towers are three-storeyed buildings with four edges.The corners are winglike.

• 整座桥梁结构巧妙，运用杠杆力学原理，大小柱、枋、檩、凳、栏杆，全部用杉木凿孔穿榫构成，不用一钉一铆。