Floating raft is type of foundation, invented by John Root, that protects against settlement and the liquification of soft soil due to seismic activity. It was a necessary innovation in the development of tall buildings in the wet soil of Chicago in the 19th century.
For a floating raft foundation, or floating foundation, the foundation has a volume such that were that volume filled with soil, it would be equal in weight to the total weight of the structure.
In the typical float bed system, the plants are in trays floating in the water and the cells of the trays are saturated with water constantly.
In the RAFTsystem, an absorbent fabric, known commercially as capillary mat, is laid over the floating polystyrene trays with about 2" to 6" of the mat hanging down in the water all around the raft of trays or insulation board.
The key to success with the RAFTsystem is that growing medium in the pots placed on the surface of the float table have good contact with the mat.
Floatingraft is type of foundation, invented by John Root, that protects against settlement and the Soil liquefaction of soft soil due to seismic activity.
It was a necessary innovation in the development of tall buildings in the wet soil of Chicago in the 19th century.
For a floatingraftfoundation, or floatingfoundation, the foundation has a volume such that were that volume filled with soil, it would be equal in weight to the total weight of the structure.
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