What is the function of a "stone mullion" in glazing systems?

The function of a stone mullion in glazing systems is primarily to act as a structural support that separates and stabilizes glass units. Mullions are vertical or horizontal elements used to provide division between sections of glazing and support the overall integrity of the glazing system. By providing this separation and support, stone mullions help distribute the load placed on the glass, ensuring stability and functionality in the glazing application. This structural role is crucial in maintaining the performance of the windows or façade, especially in larger installations where glass panels are subject to various forces, such as wind pressure or thermal expansion.

While stone mullions can indeed contribute to the aesthetic appeal of architectural designs, their primary function is to enhance structural stability rather than simply serve a decorative purpose. Additionally, while challenges in installation may arise when working with stone materials, this is not a function of the mullion itself but rather a potential consideration for contractors.