Crown 4-5/16" - 8

This 4-5/16" - 8 concave crown mould measures 4.322" width by .750" thickness requiring a 4-9/16" blank of four-quarter lumber for milling sprung (laying horizontally flat) on a commercial moulder. The attractive supporting profile comprises a 1/2" radius convex arc joined to a 5/32" vertical line segment on the top left. The short line connects to a three-inch concave semicircle in the center, with a 9/64" horizontal fillet and a 3/8" convex quarter-round bead on the design's bottom right side. The fixed spring angles are set at thirty-eight and fifty-two degrees; these particular back bevels keep the face side of the profile parallel to the wall and ceiling when installed; they also lock in the positioned height at 3-5/16" tall with a 2-25/32" projection across the top.