• <br />reflective or contrasting in color, and some have a <br />flag, sign, or reflector mounted on top (Figure 2.17). <br />These poles should be flexible enough to return to <br />their upright position if someone tampers with them, <br />or rigid enough to prevent this type of tampering. <br />Some jurisdictions or sites go so far as mounting a <br />light (usually red or blue) above the hydrants. <br />A color coding system may indicate flow capa- <br />bility of hydrants. One such system is contained in <br />NFPA 291, Recommended Practice for Fire Flow <br />Testing and Marking of Hydrants. <br />During construction or demolition, fire hydrants <br />may be out of service. Designers should specify <br />that inoperative hydrants be covered or marked <br />during their projects, so that firefighters will not <br />waste time attempting to use them. <br />Considerations - Fire Hydrants <br />~J <br />20 <br />■ Position: Orient the pumper outlet toward the <br />access lane or street. <br />■ Height: Center of lowest outlet should be 18 <br />inches above grade. <br />■ Location: Within 5 feet of an access lane or <br />street; preferably with no intervening parking. <br />■ Protection: Provide bollards if there is no curb <br />between the road surface and the hydrant; <br />locate at least 3 feet from the hydrant. <br />■ Obstructions: Locate 3 feet from any surround- <br />ing obstructions. <br />■ Consider fire department approach directions <br />and hose-laying procedures when locating <br />hydrants. <br />■ Avoid locations likely to be blocked, such as <br />loading docks. <br />■ Position hydrants at least 40 feet from build- <br />ings they serve. <br />■ Specify a hydrant marking system; in cold cli- <br />mates, use distinctive poles. <br />■ Where possible, color code hydrants to indi- <br />cate flow. <br />■ Specify that inoperative hydrants be covered <br />or marked. <br />OSHA <br />Occupational Safety and <br />Health Administration <br />136 <br />(Fig. 2.17) One example of a hydrant locator <br />pole with a reflective flag. <br />