Different profile types (open sections or hollow sections) have different heating behaviour. For example, hollow sections heat up faster than open sections (e.g. I sections, H sections) with the same U/A factor. Therefore, the coating thicknesses to be applied are…
The required layer thickness depends on several factors. These include, among others: the section factor (U/A factor), the type of profile (closed/open), the exact fire scenario (cellulosic fire, hydrocarbon pool fire, hydrocarbon jet fire, etc.), the desired fire resistance duration,…
The section factor is defined as the ratio of the flamed circumference to the cross-sectional area of the profile. There are tables for the commonly used standardized profiles. Thin-walled profiles with a correspondingly large section factor heat up more quickly…
