That standard is the Freeman Ratio, developed by John Freeman in the late 1800’s and still very relevant today, states that the nozzle orifice diameter should be half of the hose diameter. Dennis also speaks to finding balance with the Freeman Ratio and hose construction as well as nozzle reaction.
Dave McGrail is a 36-year veteran of the fire service and an Assistant Chief with the Denver Fire Department. He instructs internationally on a wide range of fire service topics, specializing in high-rise firefighting operations. He is the author of the book Firefighting Operations in High-Rise and Standpipe Equipped Buildings published by PennWell (Fire Engineering Books and Videos) in 2007. Dave holds two Associate of Applied Science Degrees in Fire Science Technology, one with a focus in Fire Suppression, and the other with a focus in Fire Prevention. Dave also holds two Bachelor of Science Degrees, one in Human Resource Management, and the other in Fire Service Administration.
View All Videos
Accurately estimating hose requirements is critical when operating in multi story buildings. In this episode, Jonathan Brumley breaks down practical methods for estimating vertical hose stretches. He covers building layout considerations, stairwell travel distances, and hose management techniques...
Vertical hose stretches introduce unique challenges that require planning and coordination. In this episode, Jonathan Brumley walks through techniques for stretching hose vertically, focusing on stairwells, standpipes, and multi level layouts. He explains how to manage hose weight, friction, and...
Not all standpipe systems operate the same way. In this episode, Kyle Smith breaks down manual standpipe systems, also known as dry systems, explaining how they function and what firefighters should expect when supplying them. He covers operational considerations, common challenges, and how manual...
Flow testing provides valuable data, but only if it is done correctly. In this episode, Kyle Romagus highlights common flow testing mistakes that can lead to inaccurate results and eventually poor operational decisions. He breaks down setup errors, calibration issues, and knowledge gaps so...
