The position of a tractortrailer-type ladder truck in which the tractor is at a 600 angle to the trailer, thus providing maximum stability of the truck when the aerial ladder is raised and extended
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}