Sealed tub

Claim 1

A tub comprising: a plurality of staves disposed in edge-to-edge relation and forming a continuous wall having an inner face and an outer face; each of said staves comprising an elongate member generally in the form of a rectangular parallelepiped having opposite elongate faces, opposite elongate edges, and opposite ends; each of said opposite elongate edges defining along its length a formation including a substantially part-cylindrical portion; said part-cylindrical portion having an axis which is parallel to planes defined by said opposite faces engaging a corresponding portion of the adjacent stave to define at the area of engagement a sealing zone; means defining a rabbet in one of said elongate faces of each of said elongate members; the rabbets extending between said elongate edges of said elongate members transversely of the lengths and between said sealing zones thereof and having side walls generally normal to the axes of said elongate members; said rabbets being aligned to form a continuous groove in the inner side of said wall; a floor of said tub formed by at least one floor member engaged within said groove; said floor member comprising a laminated plywood so oriented that immersion in water causes said plywood to swell more in a direction normal to the plane of said floor member than parallel thereto, whereby sealing of said floor member to said rabbet side walls without displacement of said elongate members outwardly of said tube is promoted; elongate means extending around said elongate members on the outer side of said wall for retaining said staves in place, and said floor member having a water resistant protective coating which terminates inwardly of said inner face of said continuous wall to expose the uncoated plywood and thereby to promote localized swelling of said floor member in said direction.