Frame Rails

Frame Rails

Definition

Frame Rails are the lengths of picture frame moulding that have been cut to size, typically with 45° miters on the ends, and are prepared to be joined together to form a complete frame. They are the essential structural pieces that, when joined, create the rectangular or square perimeter of the frame.

Uses

• Provide the structural sides of a picture frame.
• Allow for precise joining when cut with accurate miters.
• Used in both custom and ready-made frame assembly processes.
• Can be reinforced with joining hardware such as V-nails, biscuits, or splines.
• Enable flexible frame sizing since rails can be cut to fit specific artwork dimensions.

Best Practices

• Ensure miters are cut accurately at 45° for tight, seamless corners.
• Use proper joining methods (V-nails, glue, or splines) for strength and stability.
• Check rail lengths carefully against artwork and matting dimensions before cutting.
• Sand or finish rail ends as needed to avoid gaps at the joints.
• Store rails flat to prevent warping before they are assembled into a frame.

Related Terms

• Miter
• V Nails
• Standard Joining
• Lap Joint