Floatable concrete structures

Claim 1

A floating concrete dock comprising, a. a plurality of walkway units each consisting of a hollow buoyant body of concrete material having an upper surface, a lower surface, a pair of oppositely disposed end faces and a pair of oppositely disposed side faces and a water line disposed adjacent said upper surface, first passage means extending through each unit and opening through said side faces thereof at at least one location along the length thereof and second passage means extending longitudinally thereof and opening through said end faces, said first passage and second passage means each including upper passage means disposed adjacent said upper surface and lower passage means disposed below said water line adjacent said lower surface, b. a plurality of modular slipway units each consisting of a hollow buoyant body of concrete material having an upper surface and a lower surface and oppositely disposed end and side faces, and a water line disposed adjacent said upper surface, first passage means extending through each slipway unit and opening through said oppositely disposed end faces, said first passage means of said slipway including upper passage means disposed adjacent said upper surface and lower passage means disposed below said water line adjacent said lower surface, c. first tensioning cable means extending through said passage means of each slipway unit and said first passage means of an associated walkway unit, said cable means being tensioned and anchored with respect to a slipway unit and its associated walkway unit to secure them together and prevent relative movement therebetween in a vertical plane, d. second tensioning cable means extending through said second passage means of each of said walkway units, said second tensioning cable means being tensioned and anchored with respect to said walkway units to secure them together and prevent relative movement therebetween in a vertical plane.