A lintel is a structural horizontal support used to span an opening in a wall or between two vertical supports. It is frequently used over windows and doors, both of which represent vulnerable points in a building's structure. Lintels are generally used for load-bearing purposes, but they can also be decorative.

How do I know if I need a lintel?

Lintels are required for all openings over timber frames greater than 600mm in width, & for all openings over steel frames greater than 900mm.

What size opening requires a lintel?

What size concrete lintel do I need? The lintel should be installed with a minimum end bearing of 150mm, so measure your opening and add at least 300mm.