Correct Answer : mid span
Explanation : Since BM is maximum at midspan, design should be done for maximum bending moment so that it will take care for other section. Moment formula we are using is (wl2/8) which mid span moment.
Correct Answer : Option (B) : Prevent buckling of web
Correct Answer : Option (D) : Horizontal, shear due to wind or earthquake + 2.5% of column loads
Correct Answer : Option (C) : Bending moment in rafter