What is the main characteristic of structural glazing?

The main characteristic of structural glazing is its use of structural caulking to secure the glass panes to the mullions. This method allows for a seamless, uninterrupted appearance since the structural aspects are hidden, and it effectively transfers loads from the glass to the supporting frame. The structural caulking also provides weatherproofing and ensures the integrity of the building facade by creating a strong bond that helps retain the glass in the event of loading conditions such as wind pressure or impact.

In structural glazing, the glass is bonded directly to the supporting members, which allows for larger spans of glass and a minimalistic aesthetic. The approach contrasts with other glazing systems that may utilize framing or external supports, which can alter the visual impact of a building facade.

Other methods mentioned, such as using a compression gasket or a wet sealant, can be associated with different glazing systems but do not define the primary characteristic of structural glazing, which is its reliance on the strength of the adhesive caulk to attach the glass securely. Therefore, the fact that it is secured to the mullion with structural caulking is what distinctly identifies this glazing method.