Steiner Tunnel 3 : A furnace 25 ft long and 12 by 18 in. rectangular used as equipment in a standard test method for measuring the flame spread characteristics of building materials
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}