Friday, 13 February 2015

Sketchy Fact #80: Electro-Ladder

The San Francisco fire department is one of the last in North America to use wooden ladders because wood does not get electrified when it touches streetcar cables above the road... As a bonus, the ladders last longer because wood doesn't get weaker if you stress it over and over like aluminum does (think of a crinkled pop can).


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