Experts in construction materials science are testing new designs at elevated temperatures to ensure that riser shafts can withstand extreme fire conditions. This critical initiative arrives at a time when urban density is increasing, forcing architects to design taller and more complex structures than ever before. While the aesthetic and functional aspects of high-rise living have evolved, certain fundamental safety risks remain deeply embedded within the architectural core. One of the most persistent threats is the chimney effect, a phenomenon where vertical voids such as elevator shafts and service risers act as conduits for fire and smoke. This rapid vertical ascent can bypass traditional fire suppression systems, leading to catastrophic outcomes. To address this, the University of Hertfordshire has formed a strategic Knowledge Transfer Partnership with Ambar Kelly Ltd. This collaboration aims to rethink how these internal voids are managed, moving beyond standard compliance to create a robust barrier against fire spread throughout residential towers.
Addressing Structural Vulnerabilities in Modern Architecture
The Physics of the Chimney Effect: A Silent Hazard
The thermodynamics of a high-rise building are complex, particularly when considering the movement of air through vertical service shafts. When a fire breaks out, the heated air becomes less dense and rises rapidly through any available opening, creating a pressure differential that draws in more oxygen from the lower levels. This cycle creates a powerful updraft, effectively turning stairwells and service risers into giant flues. In many older and even some modern designs, these shafts are not sufficiently compartmentalized, allowing flames to jump multiple floors in a matter of minutes. The research conducted by the School of Physics, Engineering, and Computer Science focuses on quantifying these airflow patterns under extreme thermal stress. By understanding the fluid dynamics of smoke movement, engineers can design more effective seals. This analysis is vital for developing barriers that can maintain structural integrity while subjected to the intense heat and pressure generated during a major high-rise fire incident.
Regulatory Gaps: Moving Beyond External Cladding
For several years, the global construction industry focused almost exclusively on the dangers of external cladding, a priority shifted by the tragic events of the 2017 Grenfell Tower fire. However, investigators and safety experts have increasingly pointed toward internal vertical pathways as equally dangerous contributors to fire acceleration. The internal ‘chimney’ allows smoke to penetrate living spaces far from the initial point of ignition, often trapping residents who believe they are in a safe zone. The partnership between the university and Ambar Kelly is specifically designed to bridge this regulatory gap by focusing on the internal skeleton of the building. By synthesizing academic theory with real-world construction practices, the team is working to ensure that the internal risers are as fire-resistant as the external envelope. This shift in focus represents a holistic approach to building safety, acknowledging that a structure is only as secure as its most vulnerable internal void.
Engineering Solutions through Strategic Academic Collaboration
Advanced Simulations: Precision in Thermodynamic Analysis
The technical backbone of this research involves high-performance computing clusters that allow for the simulation of complex fire scenarios within a digital environment. These simulations account for various factors, including building height, ambient temperature, and the specific placement of service utilities. By utilizing computational fluid dynamics, the research team can visualize how smoke and heat interact with different types of riser materials and designs. This level of precision was previously unattainable, but the technological advancements available in 2026 have allowed for the creation of digital twins that react exactly like a physical building would during a fire. This data-driven approach enables the engineers to identify potential failure points before a single brick is laid. The goal is to develop a predictive model that can guide the design of riser shafts in any new construction project, providing a tailor-made safety solution that accounts for the unique structural characteristics of each building.
Industry Implementation: Bridging Research and Manufacturing
Moving forward, it is vital for the construction industry to adopt a proactive stance by integrating advanced riser safety designs into the early stages of architectural planning. Developers must prioritize the use of materials that have undergone rigorous thermodynamic testing, moving away from systems that only meet the bare minimum of current regulations. Future considerations should include the implementation of smart sensors within riser shafts to provide real-time data on temperature, allowing for faster emergency responses. The partnership, which scales its implementation from 2026 to 2028, provided the necessary evidence to advocate for these higher standards. By bridging the gap between academic research and commercial application, the team demonstrated that evidence-based engineering is the best way to neutralize the risks of vertical fire spread. The project concluded by providing a clear blueprint for safer high-rise construction, ensuring that lessons learned were translated into structural improvements.
