Glass spandrels and shadow boxes: Design and construction ...
Aug 11, 2021 · Like a glass panel, spandrel assemblies are often ‘glazed into’ the framing (e.g. aluminum mullions) of glazing systems. Spandrels typically incorporate some combinations of the following components, listed from exterior to interior (Figure 1).
Glass spandrels and shadow boxes: Design and construction ...
Aug 11, 2021 · Although the glass panel is required to be larger in a touch-mullion (compared to two smaller panels in a traditional shadow box), depending on the aspect ratio, the touch-mullion can provide additional structural support to the glass (e.g. under wind loads).
Glass spandrels and shadow boxes: Design and construction ...
Aug 11, 2021 · A mullion is typically provided to separate the vision zone from the spandrel zone which is often sealed to the inside of the glass with structural silicone. This assembly allows for an even greater seamless visual transition as there is no …
Glass spandrels are typically used to prevent visual read-through of objects or features that are behind the spandrel glazing, such as between floors of buildings. They are also sometimes used to create colorful aesthetic design elements in building projects.
In most curtain walls, vertical mullions extend from a warmer interior environment into a colder insulated spandrel. The mullions function as vertical thermal bridges and may decrease the overall thermal performance of the opaque spandrel area.
Spandrel: The Battle for the Wall, Part Two
Jul 10, 2020 · Heat flows unhindered to and from the transparent areas flanking the spandrel through long, continuous vertical mullions.
Table 1. overall U-values for the spandrel and vision-glass portions of a curtain wall consisting of 10 per cent mullion area and 90 per cent spandrel or vision-glass area, and simple area-weighting of the 1-D
Education - VITRUM™ Glass Group
Shadow Box Spandrels is achieved by enclosing the space bounded by the vertical and horizontal mullions behind the glass. This is accomplished by securing a painted metal pan or dark matte-finished insulation board back from the glass.
The Basics Of Curtain Wall System Construction
Mar 7, 2017 · Column cover and spandrel systems articulate the building frame by aligning mullions to structural columns. Pre-assembled or field-assembled infill units of glass or opaque panels are fitted between the column covers.
Consider localized heating to reduce condensation risk for all glass spandrels. Assess condensation risk for humidified buildings. Avoid built-in moisture (materials must be dry prior to glazing installation).