Assuming a density of 120 lb/ft3 for masonry brickwork, determine the maximum height of a brick wall if the allowable compressive stress is limited to 150 psi, and the brick is (a) four inches wide and (b) six inches wide. Solution pressure at the bottom due to wt of wall < 150 psi A) 4/12 x 1 x h x 120 = 150 x 32.174 h=120.65 ft B) 6/12 x 1 x h x 120 = 150 x 32.174 h=80.435 ft.