This paper presents the results of a case study using the fire risk analysis model CUrisk developed at Carleton University. Fire risk analysis of sixteen building design options were conducted, incorporating four different construction types (concrete, unprotected Cross Laminated Timber, Protected Cross Laminated Timber and Light timber-frame), three building heights (4, 6 and 12-storeys), and two sizes of floor areas. The results show that unprotected Cross Laminated Timber (CLT) buildings have the most severe fires with longer fire duration and larger quantities of combustion products. Non-combustible and combustible construction with gypsum board protection perform similarly in terms of fire growth, time to flashover, but for the protected combustible (CLT) construction the duration of the fully developed phase lasts longer due to the contribution of timber in the fire after the failure of the gypsum boards. A faster decay phase is seen in the non-combustible (concrete) construction. In addition, the performance of active fire protection systems in the abovementioned buildings is simulated using CUrisk. Detector and alarm systems can quickly identify a developing fire and alerting occupants to evacuate before the exits become untenable. The model also considers the effect of fire department actions on building fire safety, depending on their arrival time to the fire scene. Besides, the model shows that sprinkler systems have the best impact on fire risk. Furthermore, CUrisk is able to evaluate whether taller or larger building would have the same fire risk compared with a 6-storey building. Simulation results demonstrate that increasing the building height to 12-storey does not increase risks and there is also no increase in life risks in a larger-size 6-storey building.

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Conference 14th International Conference and Exhibition on Fire and Materials 2015
Citation
Li, X. (Xiao), Rao, P. (Ping), Zhang, X, & Hadjisophocleous, G. (2015). A case study on the effect of building construction type, height and area on the building fire risk using the fire risk assessment model CUrisk. Presented at the 14th International Conference and Exhibition on Fire and Materials 2015.