Arizona republican., 1916-02-17
PART VII CLASS A BUILDINGS AND STRUCTURES

Sect. 1. Definitions and limit of height Class "A" buildings and struc- lures designated as fire proof" or skeleton" construction. shall include every building or structure wherein ail external or internal loads or stralns are transmitted to the foundation by means of reinforced concrete or by means of a skeleton or framework of steel or iron. the beams and girderS of which shall have been riveted or bolted to each other at their respec- tive juncture points, provided. however. that in any building or structure of class "A" construction not exceeding two stories in height. the exterior walls may be constructed of masonry with piers of not less than six feet in width, and of the thickness required for the buildings or structures of the same height of class "B' construction. All beams, giIders and other steel and iron work shall be thoroughly an chored and tied to masonry
 No building or structure of class "A" construction shall exceed in height two hundred feet; no building OF structure of class A of reinforced concrete construction shall exceed in height one hundred and thirty three feet to the highest point of the roof; provided, that in building or structure of class A construction fire walls may extend not to exceed six feet above the highest point of the roof: that bent houses and roof structures for the housing of stairways may eX- tend not to exceed twelve feet above the highest point of the roof; that the structure for housing elevator shafts or elevator machinery may extend not to exceed twenty-tw feet higher than the highest point of the roof.
 Sect. ? Outer walls. All outer walls of every building of class "A" shall be constructed of either brick, stone, terra cotta blocks or concrete. Every steel or iron column of every outer wall of any such building shall have rot less than four and onehalf inches of brick, stone, tile or concrete beyond it's outer flanges. Where a facing of granite. marble or other stone which is subject to disintegration by heat is used. every metal beam. girder and column shall be protected independ- ertly of such facing with not less than two inches of concrete or of brick. stone or tile laid in cement mortar. In no case shall a bearing column be built of granite or marble. Walls of exterior light courts shall be con- structed as herein provided for the construction of outer walls.
 Sect g. Filler walls. Exterior walls built as filler walls. that is to say. walls which are carried at every story bv beams of fireproOf construction, shall be not less than four inches thick for reinforced concrete, and not less than eight inches thick for other masonry.
 Sect 4. Interior partitions. 1n- terior partitions in any building or structure of class "A" shall be con- structed of either terra cotta blocks. gypsum blocks. brick or reinforced concrete in which the stiffening metal sl.all he thoroughly fire -proofed, or shall be constructed of bars of metal lathed with metal lath and plaStered not less than five-e -eights of an inch thick, or shall be constructed of wire glass not less than One-fourth of an inch thick set in metal frames or sash. The walls of all interior light courts