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<DIV mce_keep="true">Wow, Mike, great article on the rolling Scherzer bridge for the Chicago River.  And of course, great pictures, too. (but that's getting to be expected!).  I think the best ones are those with the rolling quadrants at track level with the counterweights dropping down when the bridge is open, blocking the right-of-way.</DIV> <DIV mce_keep="true"> </DIV> <DIV mce_keep="true">What I find amazing is the size of the motor necessary; if the counterweights are almost as heavy as the bridge structure, a 1 hp motor can do the job.  Naturally, the counterweight should not be as heavy as the bridge or it would not be stable in the down position.</DIV> <DIV mce_keep="true"> </DIV> <DIV mce_keep="true">There was something amiss in the last few photographs; they came up blank on my laptop.</DIV> <DIV mce_keep="true"> </DIV> <DIV mce_keep="true">Thanks for sharing.</DIV> <DIV mce_keep="true"> </DIV> <DIV mce_keep="true">Art</DIV>
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