ABSTRACT
This chapter discusses all the loads that affect the building and how one can obtain its statistical values and use probability distribution to obtain the structure reliability. One of the main reasons for structure failure is the load. All the loads that affect the structure are considered variable as the dead load; however, the live load is variable with time and there are many researches and tests that have applied to define the variability on the live load. The total live load is composed of two parts which are the sustained load and the extraordinary load. R. B. Corotis and W. Y. Tsy used the stochastic live load model, including both sustained and extraordinary loads, as the basis of deriving load duration statistics. Poisson square wave process has been used to model sustained loads.
