Therefore the design employs two weight - reducing elements : longitudinal steel girders and piers with cap beams at varying heights .
Since the soil supporting the bridge foundations has exceptionally low load carrying capacity , it was important to reduce weight of the structure as much as possible .
The design employs two weight - reducing elements : longitudinal steel girders and piers with cap beams at varying heights .
Since the soil supporting the bridge foundations has exceptionally low load carrying capacity , it was important to reduce weight of the structure as much as possible .