Top plate
The top plate caps the studs and carries the load above. Single vs double (ribbon) top plate, why it ties walls together, and its role in the tie-down chain.
Ask Chalkline about this →A top plate is the horizontal framing member that caps the studs at the top of a wall, opposite the bottom plate. It carries the load from above (ceiling joists, the floor frame of the storey above, or the roof) and spreads it along the wall line.
Single vs double top plate:
- A single top plate suits lighter, evenly distributed loads.
- A double top plate (two members lapped over each other at corners and wall junctions, sometimes called a ribbon plate) ties adjacent walls together and spreads concentrated point loads, for example a beam or truss landing between studs. AS 1684 sets where the doubled plate is required.
The top plate is also a link in the tie-down chain: studs fix to the top plate, and the roof or upper floor ties down to it, so the wind-uplift path runs continuously through it.
Common defect: a single top plate used where a load lands between studs, with no double plate and no stud directly under the load, so the plate deflects under the point load.
Also known as: double top plate, ribbon plate (the doubled form).
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Last updated: 2026-05-24. Verified: 2026-05-24. Quarterly review for currency.