A base-isolated makeover for Pasadena's historic City Hall
![Pasadena City Hall](https://www.architecturalrecord.com/ext/resources/Static_Images/Slideshow-Fixes/Slideshow-Fixes-IV/Pasadena-City-Hall-01.jpg?t=1459952114&width=1080)
Pasadena City Hall
The seismic update and architectural renovation of Pasadena’s City Hall included the base isolation of the dome, as well as the structural buttressing of the courtyard staircases.
Photo © Victor Muschetto
![Pasadena City Hall](https://www.architecturalrecord.com/ext/resources/Static_Images/Slideshow-Fixes/Slideshow-Fixes-IV/Pasadena-City-Hall-02.jpg?height=720&t=1459952161)
Pasadena City Hall
The seismic update and architectural renovation of Pasadena’s City Hall included the base isolation of the dome, as well as the structural buttressing of the courtyard staircases.
Photo © Victor Muschetto
![Pasadena City Hall](https://www.architecturalrecord.com/ext/resources/Static_Images/Slideshow-Fixes/Slideshow-Fixes-IV/Pasadena-City-Hall-03.jpg?t=1459952210&width=1080)
Pasadena City Hall
The seismic update and architectural renovation of Pasadena’s City Hall included the base isolation of the dome, as well as the structural buttressing of the courtyard staircases.
Photo © Victor Muschetto
![Pasadena City Hall](https://www.architecturalrecord.com/ext/resources/Static_Images/Slideshow-Fixes/Slideshow-Fixes-IV/Pasadena-City-Hall-04.jpg?t=1459952255&width=1080)
Pasadena City Hall
The base isolator level supports a new basement slab. With a transfer beam, each isolator can support two structural columns.
Photo © Victor Muschetto
![Pasadena City Hall](https://www.architecturalrecord.com/ext/resources/Static_Images/Slideshow-Fixes/Slideshow-Fixes-IV/Pasadena-City-Hall-05.jpg?t=1459952300&width=1080)
Pasadena City Hall
The base isolator level supports a new basement slab. With a transfer beam, each isolator can support two structural columns.
Photo © Victor Muschetto