Most structural engineers learn about live load reduction (LLR) for the first time in school. If you are lucky, you may even be presented with the basic equation for LLR from ASCE 7 (ASCE 7-16: Minimum Design Loads and Associated Criteria for Buildings and Other Structures) and given a simple problem to work through, where the reduced design live load can be determined as follows:

L=L₀ (0.25+0.15√(K_LLA_T)) 
Eq. 1