cubic feet of Cornish granite and Portland stone, 20,000 tons of cement, 70,000 cubic yards of concrete, 31,000,000 bricks and 14,000 tons of iron and steel.
The bridge is a combination of the suspension and bascule type. The width of the river between the abutments of the bridge on the north and south sides is 880 feet. This is crossed by three spans. The two side spans, each 270 feet long, are of the suspension type.
They are carried on stout chains that pass at their landward ends over abutment towers of moderate height to anchorages in the shore. At their river ends the chains pass over lofty towers which are themselves connected at an elevation of 143 feet above high water. Heavy tie bars, at the level of the connecting girders, unite the two pairs of chains so that one acts as anchorage for the other at the centre.