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Unread 10-04-2017, 12:26 AM   #7
Carbidetooth's Avatar
Join Date: Mar 2010
Location: Boise, ID
Posts: 1,472
To determine where to spring the arch from, the radii should be equal horizontal and vertical. And yes, the inside and outside of segments will be flat and parallel. The highlighted segments illustrate this.
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Silicone (not silicon) Sealant Ranger
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