This may occur under concentrated loads or at support point when deep slender webs are employed. A widely used method of overcoming web crushing problems is to use web cleats at support points.
The phenomenon of shear buckling of thin webs “Plate Girders". Thin webs subjected to predominant shear will buckle as The maximum shear in a beam web is invariably limited to 0.7 times yield stress in shear. In addition in deep webs, where shear buckling can occur, the average shear stress (pv) must be less than the value calculated as follows: