Slide a Ladder : (1) To shift a ladder's position by sliding it sideways on its beam. (2) To make an emergency descent of a ladder, by straddling beams or rails with legs and sliding; this is a very dangerous practice
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}