Most fence posts are treated with a wood. preservative to increase their service life, but the. installation method can affect the actual life of. the fence post. These pages will serve as a quick. guide to installing preservative-treated fence. posts for the greatest serviceable life.
The entire lifetime of a thunderstorm can vary. Typical afternoon thun â¦ derstorms in the summer usually consist of just 1 cell, thus lasts 20-30 minutes. Severe thunderstorms can consist of numerous cells, and last several hours.
How long does a tornado usually last? It varies, but the average is about 10 minutes, and the median  duration is about 2 minutes.   However, a tornado can last anywhere from just a few seconds to  over an hâ¦our. The longest lived tornado on record lasted 3.5 hours.