Wednesday, July 17, 2013

Building a dry stone bridge - Part 7


 Most bridges span from piers that are the same height. The creek banks here had a height difference that required the segmented arch form to be supported at an angle of about 15 degrees.


I have wondered about this before but never tried it until Crown Bridge (bridge number twelve) - that is, if tilting the circular centering to accommodate a change in height makes much of a difference


Will the slight rotation compromise the structure of the vault ? You tell me.