Combining Loads in STAAD.Pro - Validity of the Method of Superposition - 1

It is a common practice to specify different categories of loads - like the Dead Loads, Live Loads etc. as separate load cases and combine them as per the codal requirements with the LOAD COMBINATION feature. This episode, which is the first of two, discusses about the principle of LOAD COMBINATION feature - which is the METHOD OF SUPERPOSITION. But is this method applicable for all types of load combination? Most of the engineers blindly trust the LOAD COMBINATION feature in STAAD.Pro without being aware of it's limitation. This episode also discusses the limitations, situations where the LOAD COMBINATION feature or METHOD OF SUPERPOSITION is not applicable.