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[[http://www.holoscenes.com/images/bmwiki/bridge2.png]] {{http://www.holoscenes.com/images/bmwiki/bridge2.png}}

On an arch bridge, the capstone or topping stone is a horizontal layer of stone or concrete supported by the arch and in turn supporting the road or rail bed of the bridge, or acting as a protective layer at the top of the headwall.

http://www.holoscenes.com/images/bmwiki/bridge2.png

topping stone (last edited 2009-03-22 11:16:46 by JimIrwin)