Red Seal Glazier Practice Exam

The main function of a glass mullion is to provide structural support. Mullions are vertical or horizontal members that divide and support the individual panes of glass in a curtain wall or window system. They help distribute loads from the glass to the surrounding framework and maintain the integrity of the structure, especially against wind pressures and other environmental factors. By doing so, they contribute significantly to the overall stability and durability of the glazing system.

In addition to supporting the glass, mullions also assist in ensuring that the glazing remains appropriately positioned and can help in accommodating thermal expansion, which is crucial for preventing stress that could lead to breakage. This structural role is essential in maintaining the safety and functionality of glass installations.