讨论了结构平面系统自动导荷问题，提出了一种新的求最小围定块的算法，并讨论了这一算法在土木工程中的应用．

An Algorathim of Planar Structure Systems Automatic Loads Transmition Zhang Liangang; Chen Yingbo;Zhong Luo;Zhou Xiaogong (Institute of Architecture &.. Civil Engineering,WUT,Wuhan430070,China.)In this paper, the problem of automatic load transmition of planar structure system is discussed, a new algorathim of determine the mini-closed-blocks of the plane is given,eventrually the usage of this method in civil engineering is discussed.: CAD ; design ; load transmition. closed block