Leadership

Development of the Aerial Ladder From Manual to Hydraulic Operation

Issue 8 and Volume 119.

Development of the Aerial Ladder From Manual to Hydraulic Operation Safety devices designed to protect firemen, prevent accidental damage to equipment The first successful mechanically raised turntable ladder was designed by Daniel D. Hayes, a former New York City volunteer fireman who had moved to San Francisco. There he had taken a job as a machinist for the San Francisco Fire Department, which accepted delivery in 1872 of the first “Hayes Hook and Ladder Truck and Fire Escape Combined.” Local builders constructed the truck on license from Hayes. The ladder on Hayes’ truck was raised by a manually operated crank that turned a worm screw assembly. The turntable was basically the same as found in aerials today. Later aerials were elevated by compressed air in pistons. Then came the spring assist followed by the completely springpowered elevation piston types which prevailed until the introduction of the present hydraulically operated aerials.…

Subscribe to unlock this content

Subscribe Now