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.



1 comment:

  1. Gravity is vertical but repose will place more push to the bottom of the slope. I think heavier material is required for the springers on the lower end. The vault is supported by the springers...No?

    Looks like a great project.

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