In Australian commercial construction projects, a lintel is a structural horizontal support that spans an opening, such as a window or door. It is designed to bear the load of the structure above the opening, distributing the weight to the surrounding walls or supports. Lintels can be made from various materials, including steel, reinforced concrete, timber, or masonry, depending on the specific requirements of the project and the load they need to support.

lintels are crucial for maintaining the structural integrity of a building, especially in load-bearing walls. They are typically specified in architectural and engineering plans, and their size and material are determined based on factors such as the width of the opening, the load above, and the building's overall design. Proper installation of lintels is essential to ensure safety and compliance with building codes and standards.