open sesame!
under the bridge at w.chicago street, at the lowel level of chicago's infrastructure you can see these gears. i am not so sure which of the movable types this mechanism comes from. there are several: trunnion bascule [using a counterweight], scherzer rolling lift [rolling like a rocking chair], swing bridge [rotating parallel to the water around a central point] or vertical lift bridge.
must be bascule or a similar version...
photos by life universe.
Labels: chicago, engineering
5 Comments:
http://en.wikipedia.org/wiki/Bascule_bridge
http://www.encyclopedia.chicagohistory.org/pages/166.html
http://en.wikipedia.org/wiki/Chicago_River
http://www.gapersblock.com/airbags/archives/chicago_the_movable_bridge_capital_of_the_world/
http://egov.cityofchicago.org/city/webportal/portalContentItemAction.do?BV_SessionID=@@@@1839599837.1183284248@@@@&BV_EngineID=cccfaddlfklmkhlcefecelldffhdfgn.0&contentOID=536936432&contenTypeName=COC_EDITORIAL&topChannelName=Dept&blockName=Transportation%2FChicago%27s+Movable+Bridges%2FI+Want+To&context=dept&channelId=0&programId=0&entityName=Transportation&deptMainCategoryOID=-536884516
http://www.historicbridges.org/b_c_il_cook.htm
http://www.patsabin.com/illinois/vintage6.htm
http://www.digimedia-mls.com/installations/pr19991214b.htm
http://www.ci.chi.il.us/Landmarks/Tours/RailBridges.html
Hot Chicago bridges refuse to close
http://social.moldova.org/stiri/eng/53190/
1863, November 3: Rush Street Bridge Collapse
http://www.chipublib.org/004chicago/disasters/rushbridge_collapse.html
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sorry!!!
i did not know some of the links!
very interesting!
Not bad article, but I really miss that you didn't express your opinion, but ok you just have different approach
I would appreciate more visual materials, to make your blog more attractive, but your writing style really compensates it. But there is always place for improvement
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