This paper attempts to manipulate brittle shear failure in reinforced concrete deep beam which has shear span-to-depth ratio, a/d=2.0 with aid of lattice model. Timoshenko beam type of lattice model was basically used for reinforcing steel in order to incorporate the dowel action. Truss type of lattice model was applied for plain concrete domain using union-jack type of structured mesh. Mesh sensitivity analyses focused with varying different level of unit union-jack block discretization.