Abstract: The spar is widely used in cable yarding on steep terrain. Spars are supported in an upright position by guylines. There are several methods for calculating stress in spar and guylines, but many of them have limitations. Prof. K. M. Askenazi and B. G. Zalegaler (VSSR) have suggested that it is the hardest situation when the major pull comes directly against one guyline. This will be true, however, only when the included angle between two guylines is less than 90 degrees. with the included angle more than qo degrees, that situation would not be the hardest. The major problem in calculating spar and guylines consist in frequent changing of inhaul pull direction, particularly in highlead systems. The guylines are attached to stumps arround the spar, which location may be anywhere. The aim of this paper is to provide an universal method and formula for calculating spar and guylines, and to explain the relationship between the spacing of guylines and the stress in both spars and guylines. Attempt has been made to find out the optimum guyline spacing, under which the guylines would be subjected to a minimum pull.