Standard Size Brick Jack Arch Standard size brick dimensions are 2 ¼” tall X 7 5/8” long. Prefabricated brick jack arches are made in a traditional colonial style with 3/8” joints throughout. Jack arches with keystone are made with 77 skewback angle. Heights, Angles, Joints, and Keystones are easily customized using the Archway System, upon customer request.
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