Designing custom glazing systems, such as structural glass walls or unitized curtain walls, can be a complex task that can vary widely from project to project. The level of complexity is typically driven by the architectural goals, constraints, and performance objectives. Similar to what a designer must consider with a standard system, performance criteria such as wind loads, wind-driven rain resistance, and thermal performance for the system must be met. In addition, fabrication limits and installation constraints limit what a designer can develop to meet these requirements. This paper examines a case study and the process of building enclosure design for a custom unitized glazed curtain wall as part of the renovation and expansion of an existing building. The curtain wall system includes two system variations, one of which incorporates integral balconies and the other vertical louvers that span floors. This paper will provide an example for the industry of the versatility of curtain wall and how creative design solutions can be developed in the face of difficult constraints. Additionally, this case study is an example of how an existing building can be upgraded to meet both contemporary energy performance requirements and architectural vision. Further, it will demonstrate the value in taking a multifaceted approach to design to facilitate coordination between the architectural, structural, mechanical, and enclosure teams. The increasingly integrated design required will begin to demand this type of coordination at a minimum to meet developing energy, mechanical, and building codes without compromising the architectural intent.
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