a VirtualTourist member
under the seven mile bridge,the part that is concrete.Is that solid concrete or did they put sand in hollow spaces?Thanks,Dean Thompson
It is hollow. They are concrete box sections in the shape of a flat base letter V, with a flat platform on top, that were poured in place and strung together, like a necklace, with steel cables and tensioned to what is esentially a hanging bridge. Utility cables and pipes run trough the hollow space.