Crown 3-7/8" - 13

This enchanting 3-7/8" - 13 crown mould measures 3.875" width by .750" thickness, requiring a 4-1/8" blank of four-quarter lumber for milling sprung (laying horizontally flat) on an industrial moulder. The innovative terminating profile comprises a 5/16" vertical line joined to a 1/4" tall by 3/16" wide perpendicular notch in the upper left. The rabbet joins a 25/32" concave semicircle tangent off of a 1-3/16" convex arc, creating the cyma recta in the center. The s-shaped curvature attaches to a 3/8" half-circle with a 5/32" vertical segment merged with a 7/32" cove and a 7/32" horizontal line on the design's lower right corner. 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 3-1/16" tall with a 2-3/8" projection across the top.