Originally Posted by pjm123a
About the metal fatigue from the heat. There is no doubt that the heat was intense. I could feel it from across a street. While it seemed like it was engulfed in flames for an eternity it was only a matter of minutes. The Fire Control District Report reads this:
Alarm: 11/30/2012 - 11:40:00 AM
Arrival: 11/30/2012 - 11:49:00 AM
Controlled: 11/30/2012 - 11:51:00 AM
Last Unit: 11/30/2012 - 12:14:00 PM
So while the heat was intense and burned all the plastic and rubber it did not last all that long. As I understand it steel subjected to intense heat for a prolonged period of time is what weakens it. It may be wishful thinking on my part but I don't think this was anything close to a prolonged period of intense heat and we are talking about some pretty thick steel here.
Assuming it only took you 1 minute to call in the alarm, ans another minute for the dispatcher to relay it to the station, your mower would be exposed to the heat for approximately 13 minutes. Gasoline fire temperatures range from 1650 F to 2280 F. Even if you use the lower figure, that's a lot of heat that your frame was exposed to. I'm not a metallurgist but I would be concerned about the frame integrity. These mowers are exposed to a lot of harsh terrain. Could be a problem.