Header
A header is a structural member installed above an opening to carry loads around doors, windows, and other framed gaps.
What is a Header?
A header is a beam-like framing member that spans over an opening and supports the load above it.
Headers are commonly installed over doors, windows, and large wall openings so the structure can transfer weight to the sides of the opening.
Where Headers Are Used
- Door openings
- Window openings
- Garage door openings
- Wide remodel openings in load-bearing walls
Why Headers Matter
Carry structural loads: Without a properly sized header, framing above the opening can sag or fail.
Support remodel changes: When walls are opened up, the header becomes a key structural replacement.
Help maintain alignment: Proper support keeps walls, doors, and finishes from shifting or cracking.
Common Header Materials
- Dimensional lumber
- Engineered lumber like LVL
- Steel in heavier-load applications
Common Mistakes
Undersizing the header: This can lead to sagging and cracked finishes.
Assuming every wall is non-structural: Load-bearing openings often need engineered sizing.
Poor bearing support: The jack studs or supports below the header must also be adequate.
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