Plate Cut

Definition

The plate cut is the cut at the bottom end of a rafter to allow it to fit upon the plate. It is also called the seat cut.

Purpose

The plate cut ensures that the rafter sits correctly on the wall plate, providing a stable and secure connection between the roof and the walls of the structure. It is essential for the proper alignment and structural integrity of the roof.

Examples of Use

• Roof Framing: Cutting rafters to fit snugly on the wall plate in residential and commercial roof construction.
• Timber Framing: Ensuring that timber rafters are accurately cut for traditional timber-framed buildings.
• Truss Construction: Preparing rafters for truss assembly in prefabricated roof systems.

Related Terms

• Birdsmouth Cut: A notch cut into a rafter to allow it to sit securely on the wall plate.
• Rafter: A structural member extending from the ridge or hip to the wall plate, supporting the roof deck and its loads.
• Wall Plate: A horizontal timber laid along the top of a wall to support the rafters or joists of the roof.

Notes

• Precision: Accurate cutting of the plate cut is essential for the stability and alignment of the roof structure.
• Tools: Typically done using a circular saw or handsaw, with measurements marked using a framing square.