47.5 MB - The Whole Building Design Guide

to power generation stations and by damaged lines, such as majortransmission lines and secondary feeders. Water disruptions canbe caused by damage to water treatment or well facilities, lack ofpower for pumps or treatment facilities, or by broken water linescaused by uprooted trees. Sewer disruptions can be caused bydamage to treatment facilities, lack of power for treatment facilitiesor lift stations, or broken sewer lines. Phone disruptions canbe caused by damage at switching facilities and collapse of towers.Critical facilities should be designed to prevent the disruption ofoperations arising from prolonged loss of municipal services.3.4.5.1 Electrical PowerIt is recommended that critical facilities that will be occupiedduring a hurricane, or will be needed within the first few weeks afterwards,be equipped with one or more emergency generators. Inaddition to providing emergency generators, it is recommendedthat one or more additional standby generators be considered,particularly for facilities such as EOCs, hospitals and nursinghomes, shelters, and fire and police stations, where continuedavailability of electrical power is vital. The purpose of providingthe standby generators is to power those circuits that are not poweredby the emergency generators. With both emergency andstandby generators, the entire facility will be completely backedup. It is recommended that the emergency generator and standbygenerator systems be electrically connected via manual transferswitches to allow for interconnectivity in the event of emergencygenerator failure. The standby circuits can be disconnected fromthe standby generators, and the emergency circuits can be manuallyadded. The emergency generators should be rated for primepower (continuous operation).Running generators for extended time periods frequently resultsin equipment failure. Thus, provisions for back-up generation capacityare important, because the municipal power system maybe out of service for many days or even weeks. Therefore, it is recommendedthat an exterior box for single pole cable cam lockingconnectors be provided so that a portable generator can be connectedto the facility. With a cam locking box, if one or more ofthe emergency or standby generators malfunction, a portablegenerator can be brought to the facility and quickly connected.MAKING CRITICAL FACILITIES SAFE FROM High Wind3-121