Brooklyn bridge construction materials
Pioneering Efforts of the Brooklyn Bridge. To dig the foundations for the bridges enormous stone towers, caissons, enormous wooden boxes with no bottoms, were sunk in the river. Compressed air was pumped into them, and men inside would dig away at the sand and rock on the river bottom. The stone towers were built atop the caissons,the following materials are what were used to build the Brooklyn bridge: Steel cables GraniteIron and stone mansory piersI think there are more materials too! but these are most of them! brooklyn bridge construction materials
How can the answer be improved?