Head
Definition
A head is a critical horizontal structural member that forms the top of a window or door frame, spanning the opening to support the weight of the wall above it. In the context of window and door components, it serves as the upper part of the assembly, connecting the vertical jambs and providing a weather-tight seal and structural integrity to the aperture. Additionally, the term can refer to various specialized structures in industrial architecture, such as the enclosed housing at the top of a grain elevator or the main terminal building of a transportation hub.
Structural & construction notes
Common types of window and door heads include flat or straight heads, which are standard horizontal beams, and arched heads such as segmental, semi-circular, or pointed Gothic styles. Other variations include decorative pedimented heads, radiating brick heads, and structural reinforced concrete or steel lintel heads. Common materials for window and door heads include timber, steel, aluminum, and reinforced concrete. Steel and concrete offer high durability and structural strength for large spans but come with higher initial costs and weight, while timber is a cost-effective, versatile option that may require more maintenance to prevent rot. Aluminum provides a balance of corrosion resistance and moderate cost, often used in contemporary commercial and residential framing.
Frequently Asked Questions
An educational reference. Project-specific design requires professional guidance.