Arizona republican., 1916-02-17

walls shall be wired glass not less than one-fourth of an inch thick, set in metal covered sash and frame.
 The room containing the elevator machinery shall be of the construction required for the above mentioned ele- vator shaft.
 Every dumb waiter, chute or other shaft, abutting through from floor to floor shall be of the same class of construction as required for passenger elevator shafts, or may be of metal or metal lined where too small to plaster, and openings to such shafts or chutes shall be provided with metal doors.
 If a freight elevator he placed Tn any such shaft such shaft shall be constructed as provided for shafts for passenger elevators. In case a freight elevator be not enclosed, trap doors shall be provided at each floor. which doors shall be automatic, or shall be held open hy fusible links attached thereto, and so arranged as to fall shut when the links become fused, and shall be covered with lock jointed tin on the underside and edges.
 Sect S. Light courts. In buildings or structures of class "B' the walls of every interior light court the floor or. ground area of which exceeds forty square feet shall be constructed as provided for exterior walls; or if such walls be carried on steel beams sup ported by columns at the several floors same shall be of tile brick or rein forced concrete not less than four inches thick. Walls of light courts having floor or ground area of one hundred and forty four square feet or in excess thereof. shall be con structed of brick or hollow tile blocks, laid in cement motar.
 Interior light courts of less than forty square feet in area, if not con structed of brick, reinforced concrete or hollow tile blocks, shall be lined with tight boarding having vertical stripping, and shall be metal lathed and plastered with three-fourths of an inch of hard plaster
 Sect. o. Roofs: Rafters in buildings and structures of class B" shall be placed not more than twenty four inches apart from center to center, and shan he covered with boarding not less than seven-eights of an inch thick All roof boarding shall he covered with tin. copper or felt and asphaltum covered with gravel. or with other fire-resist- ing composition.
 Sect. 10. Skylights. All skylights in buildings and structures of class B" shall be constructed as provided for in class A.
 Sect. H. Roof spaces and cornices The space between the ceiling and the top story and the roof of buildings and structures of class "B shall be divided into sections, each having an area not exceeding two thousand five hundred square feet. by tight parti- tions of One-inch redwood or by par titions of studs metal lathed and plas- tered on both sides. All openings in such partitions shall have doors of similar construction which shall be self closing.
 All cornices, gutters and appendages on buildings and structures of class
 ID Siidil Dt tOuSlI as UbTtlUDe- fore provided for the construction of cornices. gutters and appendages on buildings and structures of class A" CLASS "B' SPECIAL Slow burning construction, Build irgs and structures intended for fac tories. blacksmith or machine shops, or for storage Of implements or similar machinery, or for storage or market ing or fruits and vegetables; or for use as stables; without interior parti- tions; and having concrete or masonry walls, may have the interior columns and girders of wood, the least dimen- sions of which shall be eight inches | without fireproofing.
 Such construction shall not be used | for buildings or structures over two stories in height; and shall in all other particulars comply with the | provisions of class B" construction and shall be designated Glass B | Special"