4 ms·
They are necessary because of the large amount of hanging electrical wires SF has.
by MichaelApproved 16y ago
They are necessary because of the large amount of hanging electrical wires SF has.
- ars 16y agoWhy is it wood vs aluminium? What about fiberglass? Doesn't conduct, lighter, and doesn't fail suddenly in heat.
- britta 16y agoSee the article at http://articles.sfgate.com/2007-06-25/bay-area/17249021_1_wooden-ladders-aluminum-or-fiberglass-san-francisco-s-fire-shop http://articles.sfgate.com/2007-06-25/bay-area/17249021_1_wo... - They don't conduct electricity like aluminum or wet fiberglass ladders do....Aluminum or fiberglass, when it gets too hot, it gets soft; it will actually fold over without any warning."
- msbarnett 16y agoToo light = bad stability in high winds, like those common in San Francisco.
- sliverstorm 16y agodoes aluminum start to conduct at high voltage? Normally the oxide layer makes it a bad conductor.