The Secondary beams have minor section loss (Penetration less than 5% of section thickness)
The Transverse beams have moderate section loss causing some reduction in functionality (Penetration, 5%-20% of the section.
It may be because of water seepage from the deck surface.
The bottom of the deck-structural form can be seen clearly without much damage to it by rust or removal of paints.
The main girders are formed of paired girders, with crossbeams and cantilevers at regular intervals, and extensive lattice-member bracing connecting the other member.