Plain solid masonry walls above the main roof level, twelve feet (12 ft.) or less in height, enclosing stairways, elevator shafts, penthouses or bulkheads, may be of eight-inch (8 in.) nominal thickness and may be considered as neither increasing the height nor requiring any increase in the thickness of the wall below, provided the requirements for allowable stresses are met.
(Ord. 1799-57. Passed 5-20-57)