* CANCELLED* Distinguished Lecture Series: Silvio Baldassarra

March 25, 2020 @ 12:00 am – 12:00 am


No rescheduled date for the event has been set yet.


SkyDome: Open and Shut Case

Silvio Baldassarra, Chairman of NORR Architects & Engineers Limited

Silvio Baldassarra is an Architect with 45 years of experience in design and management of large complex projects in commercial, government, hospitality, sports and transportation sectors.  He was the project architect responsible for the retractable roof of SkyDome (Rogers Centre) in Toronto when he started with NORR in 1986 and today is Chairman of NORR Architects & Engineers Limited.

“Open the 11,000 ton retractable roof by moving three roof panels in 20 minutes”.  On June 3, 1989 the world’s first retractable roof, multi-use stadium, SkyDome (Rogers Centre) opened in Toronto.  It was a Canadian architectural and engineering innovation, designed by architect, Rodrick Robbie and engineer, Mike Allen.  As, the roof architect I spent 3 years working with the two visionaries to develop the roof design including; structure, movement systems, seals, catwalks and stadium lighting.

Thirty one years later, I will share our story of the design/build solution of the first and most successful retractable roof innovation in the world.

The retractable roof of SkyDome was the first of its kind in the world.  Four separate roof panels weighing 11,000 tons and 8 acres in area.  Three of the panels are required to move and stack on the one positioned in the north end to expose 100% of the playing field and 91% of the stadium seats.  The building technology is adapted from fail safe railway technology.  The adaption is innovative when moving 11,000 tons of roof.  The design/build team worked through solution after solution including many failures through testing in labs including University of Toronto under the direction of Professor Jeffrey Packer, before arriving at the final technology solution for SkyDome.

The presentation will start with the competition criteria which was simple “open and close the roof in 20 minutes”.  The concept proposed during the design competition was not fully engineered and was defined in concept only as 4 panels, three of which moved over the fourth.  The presentation will describe the 3 years that followed through the engineered design/build process of solutions for:

  • Building support structure for the roof panels
  • Roof structure connection to the building
  • Roof movement systems analyzed and final chosen
  • Roof seals extreme movement laterally and horizontally and seals invented for SkyDome
  • -Maintenance of roof movement systems in the roof and on the building support
  • Stadium lighting systems which are uniquely fixed to the building sculpted under the retractable roof.


From NORR:

Silvio Baldassarra is an innovative design architect recognized by his unique architecture/engineering approach to large-scale complex projects during his 45-year career. His experience spans all sectors including aviation, commercial, education, institutional, justice, sports and transportation. Today, he is the Chairman of NORR and continues to lead, design and manage major projects and to build new project sectors. He is regularly sought after as an architectural guest speaker.

Silvio’s career has included the following major projects which he strategically won, led and managed including:

  • New Toronto Courthouse, Toronto
  • Union Station Revitalization Project, Toronto
  • Wellington Rehabilitation Project, Ottawa
  • Sir John A. Macdonald Building, Ottawa
  • St. Mark’s Coptic Cathedral, Markham
  • Calgary Courts Centre, Calgary
  • Canadian Plaza at the Peace Bridge, Fort Erie
  • Terminal 2 Redevelopment, Toronto Pearson International Airport, Toronto
  • John Sopinka Courthouse, Hamilton
  • SkyDome (now Rogers Centre), Toronto

Professionally, Silvio was recognized by his peers in 2010, becoming a Fellow of the Royal Architectural Institute of Canada. In 2017, he was the Innovative Architecture Award recipient in the Premio Laziale dell`Anno 2017 by the Lazio Federation of Ontario. In 2019, Silvio was awarded the Ordine al Merito by the National Congress of Italian Canadians in recognition of outstanding achievement in architecture. Silvio is a registered Architect in Ontario and 5 other Canadian Provinces. Personally, he is a Knight of Columbus and holds a 4th degree in the Blessed Trinity Parish in Toronto.


LINK: https://norr.com/global/about-us/silvio-baldassarra-30

* Luncheon reception sponsored by The Institution of Structural Engineers