Field study of evacuation upwards long stairs, ascending evacuation, in two different
buildings, 48 meters and 109 meters high. Measuring walking speed along the stair slope and vertical speed. Presenting values for different percentiles of the studied population. The importance of not using the same value for walking speed for different stairs since the design of the stairs has a strong impact, and that the vertical speed ought to be considered as well.
Delin, M., Norén, J., Fridolf, K., Kuklane, K., Halder, A., Lundgren, K., & Månsson, S. (2015). Ascending Evacuation - Walking Speed in Stairs as a Function of Height. Paper presented at the the 6th International Symposium on Human Behaviour in Fire, Cambridge, UK.