Fifteen groups of piles support a continuous lattice girder, each set comprising four piles screwed into the river bed at an angle with an X-brace between each adjacent pair. The fitting of screw blades to iron piles, as opposed to the then accepted wooden pile, created a deeper and far more resilient base support.
Fifteen clusters of piles support a continuous lattice structure, with each cluster consisting of four piles inserted at an angle into the river bed, linked by X-braces between neighboring groups. This substitution of screw-bladed iron piles for traditional wooden ones enhanced the base's stability and durability.