Thermite Timeline for Demolition of Structures


In 1972 Pyronol.RTM. was patented

Google Patents 3695951

"A suitable container may be of the one described in co-application Der. No. 74,434 filed Sept 22, 1970, entitled "Incendiary Torch" by Horace H. Helms, Jr. Alexander G. . . . The material is sealed into said container, which in this case is a torch, is ignited . . . When the pressure inside the container exceeds the strength of the diaphragm the diaphragm fractures and the expanding gases will force the molten material through the nozzle. . . . Alternatively one may add a material to the instant composition which will decompose into a gas or vaporize into a gas when exposed to the heat . . . such as powdered polytetrafluoroethylene (Teflon) or other solid materials."


In 1989 a patent was given for a device used to demolish submerged platforms.

Google Patents 4799829

“The cutting of the piling is performed by a series of tubes radially deployed in the cutter on a common plane. Each tube is filled with what is, in essence, a solid fuel similar to thermite or magnesium. Thus, the cut is performed through the use of a series of solid fuel torches. The preferred solid fuel is **Pyronol.RTM**.. Pyronol.RTM. is manufactured by Goex, Inc. and the material itself is the subject of U.S. Pat. No. 3,695,951. Pyronol.RTM., once ignited, will attain temperatures between **six and twelve thousand degrees Fahrenheit**. These temperatures are sufficient to burn through steel and concrete.”


In 1992, it was standard military procedure to use thermite to bring down vertical steel structures.

United States Military Field Manual FM 5-250; Explosives and Demolitions, June 1992:

3-6 Steel Cutting Charges.

(d) Nickel-molybdenum steel. This type of steel cannot be cut easily by conventional steel cutting charges. The jet from a shaped charge will penetrate it, but cutting requires multiple charges or linear-shaped charges. Nickel-molybdenum steel shafts can be cut with a diamond charge. However, the saddle charge will not cut nickel-molybdenum shafts. Therefore, use some method other that explosives to cut nickel-molybdenum steel, such as thermite or acetylene or electrical cutting tools.

Download: FM 5-250 - 15 JUN 92 Explosives and Demolitions 7,604 KB


Read: unitedstatesarmyfm5-250 - 15june1992.pdf