An approach is made to compare the basic properties of the two curves plotted on experimental shear strength and geometrical proportion of effective span respectively, over the function of shear span. The illustration is made on the controlling or influencing points of shear and flexure over the span of the beam. Shear stress is the function of the shear span which decreases with an increase in shear span. The graph is plotted on maximum shear stresses ( ) versus shear vu span to depth ratios (a/D) is compared with the graph plotted on ratios of mid-span to shear span (l /2a) versus shear span e to depth ratios (a/D). The dominant positions of shear and flexure are marked by intercepting the tangents on curve [(l /2a) versus (a/D)] at specified points. The influencing position of shear and flexure are compared by a position of cracks e and mode of failure of the beam subjected to two points loading with respective (a/D) ratio.