Neisel's Formula : One of several useful empirical formulas developed from fire tests for estimating the fire resistance of columns, floors, partitions, and walls; Neisel's formula concerns materials of lower ranges of density.
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}