The recent loss of Union Corner in Glasgow highlights the vulnerability of historic buildings to fire. Dating back to 1851, the structure at the corner of Union and Gordon Streets was completely engulfed following a fire that reportedly originated in a ground-floor vape shop. Witnesses reported hearing explosions within the store as the fire intensified, which may have contributed to the rapid fire spread and eventual partial structural collapse. The official cause of the fire remains under investigation.
Despite an extensive emergency response involving approximately 250 firefighters and 18 fire engines, the fire could not be contained before the building was largely destroyed. The incident not only damaged a historic building but also disrupted the surrounding community, with nearby businesses forced to close and operations at Glasgow Central Railway Station affected.
Why Fires Spread Differently in Historic Buildings
The Glasgow fire also illustrates how the construction characteristics of historic urban buildings can influence fire behavior. Buildings constructed during the 19th century often contain timber structural elements and combustible interior finishes that increase available fuel during a fire. Many were built in closely connected blocks where properties share party walls, roof spaces, or other concealed cavities that allow fire to travel unseen through the building envelope.
Mixed Occupancies Increase Fire Risk
Mixed occupancies can further complicate the fire risk profile of historic buildings. In historic urban commercial districts, buildings often contain multiple occupancies within the same structure, such as retail units at street level with offices or residential accommodation above.
The Glasgow fire illustrates how a fire originating in one tenant space can threaten the entire building. Retail environments may introduce additional hazards such as electrical equipment, product storage, and battery-powered devices, all of which can increase ignition potential and fire load. As tenant uses evolve over time, the overall fire risk profile of a historic building can change significantly, requiring careful evaluation of fire protection systems and life safety strategies.
Fire Protection Strategies for Historic Urban Buildings
Fires that originate in tenant spaces, such as the reported vape shop in the Glasgow incident, can quickly threaten adjacent occupancies if they are not controlled early. In mixed-use historic buildings, a fire starting in one tenant space can rapidly spread to neighboring businesses or upper floors containing other occupancies.
Fire protection strategies that detect and suppress a fire early are critical in these environments. Depending on the building configuration and preservation constraints, suppression systems can often be designed to control a fire while minimizing impact to historic structures.
Because tenant uses in mixed-use historic buildings frequently change over time, fire protection assessments during renovations or occupancy changes are important to ensure that life safety systems remain appropriate for evolving hazards.
Protecting Historic Buildings and the Communities Around Them
Targeted upgrades to fire protection systems can significantly improve life safety and help prevent a fire in one tenant space from destroying a structure that forms part of the historic fabric of a city. Fires in buildings like Union Corner are not simply the loss of a commercial property. They represent the loss of architecture, history, and places that have been part of a community for generations.
As historic buildings continue to adapt to modern uses and changing tenant hazards, thoughtful fire protection engineering plays an important role in protecting both the people who occupy these spaces and the structures themselves.