a "transom" refers to a horizontal structural element or beam that is typically found above a door or window. It serves both functional and aesthetic purposes. Functionally, a transom can provide additional support to the structure above the opening, distribute loads, and enhance the stability of the wall. Aesthetically, transoms can be used to allow additional light into a space or to create a visual separation between different sections of a building.

Transoms can be made from various materials, including wood, steel, aluminum, or glass, depending on the design requirements and the overall architectural style of the building. In modern construction, transoms are often integrated into curtain wall systems or storefront designs, contributing to both the structural integrity and the visual appeal of the building facade.