~ r <br />~ r <br />o "V <br />f~ <br />(Fig. 3.1) Sprinkler zone control station and zone <br />indicator sign. <br />Considerations - Sprinkler Zoning <br />■ Coordinate pipe arrangement with fire alarm <br />zoning. <br />■ Keep sprinkler controls independent of <br />standpipe systems. <br />■ Avoid dual feed systems, or provide cross- <br />reference signs. <br />WATER SUPPLY CONTROL VALVES <br />Fire service personnel often need rapid access to <br />valves. If a valve is closed during an incident, it <br />may need to be opened to permit flow of water. If a <br />sprinkler valve is open, it may need to be closed to <br />assist in manual suppression efforts. <br />NFPA 13 requires marking for all water supply <br />control valves including main valves, pump valves, <br />sectional valves, and zone valves. The wording <br />"control valve" by itself does not tell a user the <br />specific use of the valve or what portion of the sys- <br />tem is downstream of a particular valve. Using <br />more descriptive labels such as "12th floor" or <br />"pump bypass" will avoid confusion (Figure 3.1). <br />If a valve identification is not obvious, an addi- <br />tional diagram should be provided. For instance, if <br />a floor has multiple zones, each control valve sign <br />should identify the corresponding zone, such as <br />"12th floor east" or "zone 7-2." A diagram of zones <br />and the boundaries between them should be <br />(Fig. 3.2) Sprinkler zone diagram. <br />mounted adjacent to each valve (Figure 3.2). This <br />will enable firefighters to quickly determine which <br />valve controls each specific area. <br />NFPA 13 requires valves to be accessible for <br />operation. If valves are located in stairs, they will be <br />protected and easily accessible during a fire event. <br />When a water supply control valve must be <br />located in a room or in a concealed space, a sign <br />outside the door or access panel helps firefighters <br />to quickly locate it (Figure 2.20). If the concealed <br />space is above a suspended ceiling, the appropri- <br />ate place for the sign is on the fixed ceiling grid, <br />rather than on a removable ceiling tile. In addi- <br />tion, some jurisdictions require exterior signs that <br />indicate the locations of interior valves (Figure 3.3). <br />Valve handles are often located high enough to <br />be out of vandals' easy reach. However, such <br />placement requires a ladder to reach them when <br />F.IRIV SIERVICE FEATU'R'ES OT B'UILDCNGS. AND FIRE PROTECTION SYSTEMS 28 <br />145 <br />• <br />I <br />~I <br />