Serpentine channel glass systems
While the same basic design principles apply to serpentine channel glass applications, one technical challenge is ensuring a homogenous appearance when transitioning between a convex or concave radius. The joint connection between convex and concave radii creates a fixed transition point. Careful planning and precise installation are necessary to ensure the channel glass segments do not collide at this fixed point, but rather flow smoothly into adjacent sections.
To create a seamless transition at the joint connection, it is possible to use flange-cut pieces (L-shaped pieces of channel glass) and channel glass segments in a combination of different widths, as is done in stepped transitions. This was the case in Canada’s Bradford West Gwillimbury Leisure Centre, designed by Salter Pilon Architecture. To ensure the channel glass segments did not interfere with the joint connection and interrupt the channel glass wall’s uniform look, flanged L-shaped channel glass planks were installed on one side of the joint transition and full U-shaped channel glass planks on the opposing side. This configuration allowed the channel glass framing head and sill components to be stretch-formed into a smooth, continuous structure with a precise radius.
As serpentine channel glass systems may require manufacturer or supplier involvement, so it is important to consider early collaboration during the design and specification stage. Conversations during the initial phase can help conserve time and costs during installation, and leave critical time for problem-solving and design adjustments.
Staying ahead of the curve
While curved and serpentine channel glass systems can add visual interest and engagement to curtain walls and façades, their translucent channels can also redefine how light plays into a space. Varying the translucency of the cast-glass channels or adding bold polycarbonate laminates to the channels can create eye-catching façades that double as privacy screens.
Color-coated metallics and custom decals can help design professionals achieve decorative walls and partitions. It is also possible to set lights between the primary wall and channel glass system to create gently curving partitions or façades that glow at night, while taking advantage of sunlight by day.
Before moving forward with the final specification, one design option is to consider how light, texture, and color can add to the visual appeal of curved and serpentine channel glass systems to create a façade, entry, curtain wall, or partition that sets the building apart.
In the final article in this three-part series, this author explores high-performance systems that address meeting hurricane, sound, and thermal insulation requirements.
Jeff Razwick is the president of Technical Glass Products (TGP), a supplier of fire-rated glass and framing systems, and other specialty architectural glazing. He writes frequently about the design and specification of glazing for institutional and commercial buildings. Razwick is a past-chair of the Glass Association of North America’s (GANA) Fire-Rated Glazing Council (FRGC). He can be contacted via e-mail at jeffr@fireglass.com.
