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<br /> <br /> <br />IVuecllcmical Equipment <br /> <br />a <br /> <br />Low Flood Walls <br /> <br />Figure 25.-Protection of Mechanical Equipment. This wall was constructed to protect <br />vital equipment from low stage flocxling. <br /> <br />Termination of Utilities <br />When flood proofing a building, provision should be made to eliminate the threat of <br />flooding by way of gas mains, sewers, conveyor systems and water pipes or drain tiles <br />which enter the building. Gate valves or one-way swing valves can be installed in utility <br />pipes to provide protection against the threat of this source of flooding. Figures 20 and <br />21, in Chater IV suggest locations for valves to shut off sewer lines. Figure 26 illustrates <br />several types of valves that could be used for such purposes. <br />Vitrified clay pipe should not be used within the confines of building walls, and they <br />ShCR1ld never be located next to an entry valve. If sewers are to be valved off they should <br />be cast iron, steel, or reinforced concrete. Otherwise the pressure built up in the line <br />could cause a rupture. <br />Fuses and circuit breakers servicing flooded building areas should be clearly marked <br />and easily accessible. Electrical circuits serving lower building levels should be designed <br />or modified so that they can be cut off if flooding begins. This will protect against fires <br />and loss of life due to electrical shocks. As another precaution, valuable electrical appli- <br />ances which cannot be moved should be disconnected at the unit to prevent short circuiting <br />and damage to their power components. <br /> <br />Continuation of the Building Systems <br />Unless a building is to be completely evacuated during a flood, provision should be <br />made for continuing essential building systems at least on a limited basis. First consider- <br />ation should go to locating central telephone equipment and electrical transformers above <br /> <br />35 <br />