(1) Empirically constructed brick cavity bearing-walls shall comply with the requirements of this section.

(2) In single-storey dwelling-houses only, such walls shall have less than 65 millimetres in thickness, and their dimensions shall comply with Table XI.

(3) Such gable-walls with leaves 65 millimetres in thickness shall have a height to the top of the gable not exceeding the following-

a) for a wall bonded with header bricks at every alternate course, 4,8 metres;

b) for a wall bonded otherwise than as described in paragraph(a), 3,6 metres.

(4) If such cavity-walls with leaves 65 millimetres in thickness are bonded into pier or piers of a total solid cross-sectional area not less than 440 by 330 millimetres, not farther apart than 3,6 metres by shall not exceed 7,2 metres

(5) In all two-storey buildings, the leaves of such walls shall not be less than 100 millimetres in thickness, and shall comply with the dimensions set forth in Table XI.

(6) Such walls having leaves 100 millimetres in thickness shall not exceed two storeys in height, and the height to the top of the gable of any such gable-wall, measures from the floor of the gabled storey, shall not exceed 4,8 metres.