Structural Engineer Reviews Case Studies Showing Façade Systems Selection for Iconic Building Architecture

David Vadocz
Photo source
David Vadocz | Photo: FGIA

Date: 7 June 2024

David Vadocz, Principal Engineer, shared background information about façade movement, including balconies within facades and various other design considerations.

Participants at the Fenestration and Glazing Industry Alliance (FGIA) Summer Conference in Montreal, QC, heard from a structural engineer about how to select façade systems for iconic building architecture. David Vadocz, Principal Engineer, shared background information about façade movement, including balconies within facades and various other design considerations. He provided several case studies with special emphasis on the recently renovated University of British Columbia Museum of Anthropology building.

“Imagine working on an iconic building,” said Vadocz. “They materialize from a dream, based on a sketch.”

Façade System Selection

Vadocz said selecting an appropriate facade system depends on, firstly, facade movement. “A major type is interstory drift, or its lateral movement relative to the floor above and below,” he said. “The facade goes along for the ride.” Glazing systems like curtain walls, window walls and glass walls are often used in facades. “The facade engineer needs to confirm what the interstory drift amounts are before the facade can be designed,” said Vadocz. “Pay attention to both elastic or service interstory drift and inelastic interstory seismic drift.”

Façade Movement

The three types of façade movement are rotating, racking and translating. Typical interstory drift allows for movement of up to six inches, he said, although vertical movement is considered too, and usually allows for up to 3/4 inch movement.

“Façades can have a combination of movements,” he said. “Don't underestimate gravity and friction. This is where full-scale mockups can be important.” Other tips he offered included paying special attention to inside and outside corners of racking curtain walls ang glass walls and always detailing corners and jamb joints with translating window walls. When done properly, the results can be remarkable, said Vadocz. “It is incredible to see the movement allowed in these mockups where the structure goes back to normal again and passes air, water and structural testing.”

Considerations for Balconies

When it comes to balconies, he said he understands hesitation. “You may think, are they really a good idea with a curtain wall? But it can be done,” he said. He advised allowing for the different movements of a window wall or curtain wall. “The joints matter,” he said. For a less complicated fix, Vadocz said his company is seeing many bolt-on balconies that allow for faster installation.

Museum of Anthropology

He concluded with an overview of the University of British Columbia Museum of Anthropology building’s renovations. Designed in 1976 by the late architect Arthur Erickson, it was determined to have a high level of seismic risk in 2017. Its modern structural glass façade and skylight replacement was completed to preserve the integrity of this glass-paned historic building. Unique glass structural challenges were overcome to make an architect and owner’s dream come true. Among other things, it used multiple types of fittings.

“This structure houses artifacts,” said Vadocz. “It was more than 40 years old and was not built with seismic movement in mind. Much consideration was needed for its glass performance criteria.”

The FGIA Summer Conference continues through June 6. For more information about the event, visit FGIAonline.org/news.

600450 Structural Engineer Reviews Case Studies Showing Façade Systems Selection for Iconic Building Architecture glassonweb.com

Others also read

Educational event for architects to highlight Glass Magazine Award winners
Vitrum 2025 is now underway at Fiera Milano-Rho, bringing together the global glass industry for four days of innovation, sustainability, and international collaboration.
GlassBuild America 2025 brings the latest innovations, expert insights, and hands-on demonstrations to help glass professionals grow, connect, and stay ahead.
Italian market: a supply chain that worth €6 billion, exporting almost 70% | The global challenges: green transition, AI, and new markets. | More than 200 exhibitors, 30% international
A panel sponsored by the FGIA Sustainability Steering Committee will be held during the 2025 FGIA Fall Conference, taking place October 6-9 in Indianapolis, IN.
On 10 September, Ursula von der Leyen, President of the European Commission, delivered her first State of the Union address of her second term.

Add new comment