Within an industrial factory, it is required to cover the roof using the steel truss shown below. The covered area is (60m x 20m). The spacing (S) between the truss is 6mm. The roof cover is a steel sheet with an own weight of 0.1 kN/m2. Consider that the own weight of the steel structures is 0.3 kN/m2 , the live loads is 0.35 kN/m2 , and the snow load is 0.4 kN/m2.  Calculate the ultimate design loads on the intermediate truss considering the following three cases separately? By using (STR) load combination.

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