ULTRA BRICKS, cement concrete bricks (closed cavity), manufactured by M/s KRUPA BLOCKS is in accordance with IS 2185 (part-1) -1979 (reaffirmed 2003). Closed cavity bricks are suitable for earthquake resistant construction. The vertical reinforcements and infill concrete at corners, junctions, jams of doors and windows and at free ends, by taking advantage of the holes in ultra bricks, along with the horizontal bands at plinth, bottom sill of windows, lintel and roof band makes the wall ductile and shear resistant as envisaged in IS:- 4326-1993 for earth quake resistant construction.