Horizontal Reach : The lateral or longitudinal length, measured along the ground, of the water stream that issues from a nozzle; usually it is taken as 1 ft for each psi of nozzle pressure
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}