Arizona republican., 1916-02-17
PAGE TEN

tO the maximum floor load.
 The foregoing floor loads (but not the roof or sidewalk loadsD may be decreased by twenty pounds in build in8s of fireproof construction
 Sect. ,. Arches and Lintels Every opening exceeding five feet in width in wall of brick or stone shall have an arch of stone, brick or terra cotta. securely keyed and witk good and sufficient abutments. or such building or structure shall have lintel of stone. iron. steel or rein forced concrete. If wood lintel he used. over the inside of any opening more than thirty inches wide. there shall be a relieving arch over the same. No wood lintel shall be placec ever all opening exceeding five foot in width. There shall be no cast iron lntels used on openings exceeding seven feet in width. No wooden beams pr girders shall be used to support any masonry wall.
 Sect. ,. Fire protection for open ings. No opening in an interior ma SonrY wall shall exceed s feet by 1U
 
 or fire wall, same shall have standard automatic fire door on each side of such wall. If an opening in a fire wall be made to serve as an emer- eenCy exit, same shall not exceed 4S square feet in area, and q self-clos- ing swinging fire door shall be sub stituted for one of the automatic fire doors. The total openings in fire wall shall not exceed 25 per cent in linear length of the wall
 Every building or structure within the Special Fire Limit except churches, dwelling, tenement houses dorm;tories, lodging houses and iso- ,ated public and semi-public buildings shall have fire doors. shutters, or wired glass in incombustible frames ana sash on every exterior opening above the first story, except when fronting on street not less than thirty feet wide. or where no other building be within thirty feet of any such opening. The wall of any build ing or structure in the same plane as that in which any such opening be situated, shall not be considered as coming within the intent of this rule All openings iE the side and rear walls of the first story, except show windows. shall be protected as de- Scribed in this section when within thirty feet of any other building or structure.
 All windows more than seventy five feet above the curb shall have incom- hustible frames and sash glazed with wired glass
 Sect. f. Stresses and weights of material In computing the strength ahd weights of walls. floors and ma terials, a cubic foot of material shall be deemed to have the weight and strength given in the table of either of the following hanGbooks: F. F. kidders Architect and Builders Pocket Book" or "Haswelrs Mechan- ic's and Engineers Pocket Book or "Troutwines Hand Book
 Sect ,. FOUNDATION WALLS. FOOTINGS.
 Depth. The depth of foundations of brildings and structures of classes A. E and C, shall be not less than the depth described in the following schedule: One story buildings or structures not less than one foot be- low natural surface of the ground: two or three-stOry not less than two feet; four r-story not less than three feet: five or six story. not less than four feet, seven story, not less than five feet; eight. nine or ten story, not less than six feet.
 Provided, however, that nothing in this section contained shall prevent. the City Inspector of Buildings from requiring a greater depth for fouEda- tions, if. in the judgment of the City Inspector of Buildings. such be neces- Sary for the stability of said founda- ton and the building or structure pro- posed to be erected thereon.
 Legal depth. The depth of eleven feet below the curb level of the street is herby fixed as the standard depth of foundations for buildings and other structures Any person excavating for or commencing a foundation at a greater depth than the above stand ard, shall be responsible for all dam ages resulting to adjoining buildings ur structures, the foundation of which have heretofore been constructed at q standard depth. No persons con- structing foundations to the standard depth shan be liable for damages to contiguous buildings or structures he walls of which have not been con- structcd to the standard depth.
 Footings. Basement or foundation walls and piers shall have footings of concrete or be built of other ap- proved masonry laid up in cement mortar, proportiOned to the sustain- ing value of the soil, and the loads to ae imposed thereon. Such foOtings shall be not less than = per cent wider than the walls and piers which they carry. unless otherwise pro- Vided for in this ordinance
 For estimating the load on foot irgs, the following conditions shall he ohServcd
 Warehouses and factories, full dead and full live load: in stores, build iugs and such other structures for light manufacturing purposes, and in buildings and other structures for public assemblage or amusement, full dead load. and 75 per cent of the live load; in office buildings hotels. apart meat houses. dwellings, stables, and such other structures. a full dead load and 40 per cert of live load. F'ootings shall be so designed as to make the ioad IS nearly uniform as possible.
 Section 6, Bearing Power of Soils. When TO test of the sustaining power of the soil is made, the respective soils hereinafter named shall be deemed to safely sustain the follow ing loads per square foot of area: Adobe ...................1 .1j00 pounds Adobe CaliShe ......... 2000 :" Clean. S1nf S0O0