Structural Principles by Civic Engineers
The fixed structure consists of a randomly ordered grillage of small sectioned steel channels founded in the river bed and extending to a height just below the high water mark. Embedded within the frame will be non-structural timber members to encourage the colonisation by flora. The fixed pools are split across two levels and sit on a concrete slab suspended on the steel frame.
The second adjoining floating structure is free to rise and fall with the tide. This is restrained with a series of substantial fixed posts which allow the open concrete waffle slab to rise and fall. Surrounding the pools, a concrete deck with cast-in air pockets counterbalances the weight of the planted rock gabion cages. The concrete deck can be precast off site and floated up the river into position.