Abstract: Building construction and building layout represent two key critical pieces of information for a fire suppression operation. However, fireground incident commanders (FGCs) frequently do not have access to critical, updated information about a structure, including details that could potentially support more effective response. This gap in the information pipeline has led to significant injuries and fatalities for both civilians and first responders. Towards this end, this paper focuses on evaluating the efficacy of a user interface prototype for supporting decision-making during a simulated commercial structure fire. Sixty-four firefighters (n = 64) from North America participated in this study. Overall, there were no statistical differences in the performance of the firefighters between the two experimental conditions (2D vs. 3D). This study provides preliminary support for the use of 3D models in pre-incident planning practices. More importantly, this initial data serves as a baseline for the development of evidence-based standards for displaying pre-incident planning information to FGCs digitally.