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noirish Los Angeles
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Posted
May 17, 2012, 7:02 PM
BifRayRock
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Join Date: Apr 2012
Posts: 1,366
Quote:
Originally Posted by
MichaelRyerson
'each...cover saved 500 pounds of metal'?? How? Manhole covers are seriously heavy but still, they can be moved by one man with a long-handled hook and some elbow grease. Are they suggesting manhole covers weighed 500 pounds?
Just a guess, but the weight estimate may have been factoring in some corresponding metal superstructure and mating surface that is typically embedded in the street with metal covers. The wooden cork versions do not look as though they used this setup.
http://www.sewerhistory.org/images/acn/8.gif
Or, possibly foundries used a very special top secret type of pig iron that was susceptible to evaporation when exposed to light?
I do understand that this is not LA related, but there may be a slight Noir factor.
http://www.sewerhistory.org/images/m...1937_mid01.jpg
Last edited by BifRayRock; May 17, 2012 at
7:50 PM
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