My apologies if took quite some time for me to reply. As you can see I have a figure 1 and figure 2 model. I am not sure if which of the two is correct when modeling and looking for the deflection, however as you can see from load case SUS only, I only get less than 3 displacement with a 9 meter span, but in my calculation (theoretically) it is way far from 12.5 mm sag that I used. I think I'm missing some multipliers (safety factors) which were used by CAESAR II. Because I am having difficulties explaining my computations since it is too far from CAESAR II results. Any info will be greatly appreciated especially safety factors that I wasn't able to include. Kindly, include the reference or the title of the book if there are any for me to consider. Thank you.