Ladder Fuels 4 : Fuels that provide vertical continuity between strata. Fire is able to carry surface fuels into the crowns of trees with relative ease
Australian Fire Authorities Council AFAC, Glossary Of Rural Fire Terminology, East Melbourne, Victoria, Australia 2011. http://www.docstoc.com/docs/31795028/AUSTRALASIAN- FIRE-AUTHORITIES-COUNCIL-GLOSSARY-OF-RURAL-FIRE, (For Fr - Brit) {7}