Continued from January 15, 2016.
The strength of the USS Constitution's sides came from a revolutionary design by shipbuilder Joshua Humphreys called "frame and space."
The outer layer was of white oak planking up to seven inches thick on top of 12 inches of live oak frames, followed by an inner layer of white oak planking up to five inches thick.
There was only a gap of two inches between the pairs of white oak frame.
--Brock-Perry
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