In reinforced-brick walls, the following requirements shall be complied with-

a) where-

i) the stresses in bearing-walls designed in accordance with sections 75 to 82 exceed those permitted in sections 67 and 68; and

ii) such walls are required to sustain lateral forces or loads with an eccentricity greater than one-sixth of the thickness of the wall;

the bricks which compose the walls shall be slotted or grooved so as to permit the accommodation of the vertical reinforcement and its required covering of grout without relying on the vertical joints between the bricks;

b) where openings in the wall have a height greater than 12 times the width of the brickwork between openings, the walling between the openings shall be designed as a column.