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1 . Limit the size of buildings. The larger the <br /> area of a building the greater the difficulty <br /> of fighting a fire and the greater the <br /> likelihood of a serious fire involving other <br /> nearby buildings. <br /> 2. Provide exterior walls and parapets that will <br /> restrict the spread of fire. <br /> 3 . Protect windows and other openings in <br /> exterior walls when buildings are or may be <br /> closely build to property lines. <br /> 4. Use a roof covering that is effective against <br /> fire exposures and possesses no flying brand <br /> hazard. <br /> The next principle is to construct a building so that <br /> it will limit the extent of a fire. For this codes <br /> include provisions which: <br /> 1. Limit the size of the fire areas in the <br /> building. Such is accomplished by the <br /> construction of adequate fire walls. When a <br /> wall is called upon to stop a spreading fire <br /> it must have not only the ability to restrict <br /> the transmission of heat but it must have <br /> stability against collapse or overturning far <br /> in excess of that presented by other walls. <br /> 2. Limit the spread of fire upward in the <br /> building. This is accomplished by enclosing <br /> vertical openings and communications, shafts <br /> used for elevators, dumbwaiters, pipes and <br /> other utilities, air ducts and also the <br /> stairways previously discussed, with walls <br /> having a specified fire resistance rating. <br /> The enclosure of shafts is not complete <br /> unless all openings are adequately protected <br /> with fire doors. <br /> 3 . Provide vertical separation between openings <br /> in exterior walls. This help to restrict the <br /> spread of fire from the windows on one story <br /> through the windows of the story above. <br /> 4 . Provide a approved automatic sprinkler system <br /> to control a fire for occupancies where there <br /> is manufacture, storage or sale of <br /> combustible goods, merchandise or materials. <br /> The next principle is to construct buildings so that <br /> the fire department will be able to save lives and <br /> property by containing the fire within the building of <br /> origin or, in buildings that are tall, to the floor of <br /> origin. All of the previously mentioned factors are <br /> important, and additional provisions include: <br /> 1. Fire resistive type of construction for tall <br /> buildings so the fire fighters can operate <br />