(1) Walls, piers and columns shall be so proportioned that the stresses in them due to the worst combination of forces to which they may be subjected 13 do not at any point exceed the values presented in sections 67 to 73 and section 78 for the several materials and conditions to which those sections relate.

(2) Provision shall be made for the transfer of all lateral forces to the ground without causing stresses in excess of those referred to in subsection (1).