In commercial construction projects in Australia, an "eave" refers to the overhanging edge of a roof that extends beyond the exterior walls of a building. It provides protection from the elements, such as rain and sunlight, and can also contribute to the building's aesthetic appeal.

Eaves can vary in size and design depending on the architectural style and functional requirements of the building. They can be simple and straightforward or more decorative, with features like brackets, moldings, or other architectural elements.

This overhanging section serves several purposes, including:

1. Weather Protection: Eaves help to protect the walls and foundation of a building from rainwater by directing it away from the structure. This reduces the risk of water infiltration and damage.

2. Shade and Cooling: Eaves provide shade to the windows and walls, which can help in reducing the heat gain inside the building. This is particularly beneficial in Australia's hot climate, as it can contribute to energy efficiency by reducing the need for air conditioning.

3. Aesthetic Appeal: Eaves can enhance the architectural appearance of a building, adding to its visual appeal and character.

4. Ventilation: In some designs, eaves can incorporate vents that allow for proper ventilation of the roof space, helping to prevent moisture buildup and improve the longevity of the roofing materials.

The design and dimensions of eaves can vary depending on the architectural style, local building codes, and specific requirements of the project. In Australia, considerations such as climate, wind loads, and potential for bushfires may influence the design and construction of eaves in commercial buildings.