9 ensp 0183 ensp Bearing Capacity of Rocks Intact Rock MassIntact Rock Mass A rock mass with joint spacing greater than 4 to 5 times the width of the footing Local and General shear failure is associated to brittleGeneral shear failure is associated to brittle and ductile rock respectively Indian Standard Sand TAMIN is the only company supplying Indian Standard Sand IS650 1991 as per B I S approval to various cement factories research laboratories etc for testing the quality of cement