Fire engineering design for concrete structures consists of an assessment of the thermal exposure, an estimation of the temperature distribution within the member and an assessment of the resistance of the member subject to the design fire exposure. Fire safety design for concrete members is typically specified by the minimum dimensions and concrete covers to reinforcement for a given standard fire resistance period. The minimum covers have been derived to ensure that the temperature of steel reinforcements does not exceed a specified critical temperature. The normal axis distance is determined in accordance with Eurocode 2-1-2.

If required nominal distance is not provided by concrete cover, Aithon SFS intumescent coating can be used to compensate the missing concrete thickness and therefore guarantee the required fire resistance to the structural element.