Improvements in Floor Construction

An antifouling and anticorrosion marine coating composition comprises a base vehicle of a pitch (e.g. coal tar pitch), an epoxy resin having an epoxy equivalency > 1, a curing agent for the resin and an organotin compound of formula R3SnA or (R3Sn)2B in which R is a C1-C8 alkyl radical, A is a monovalent salt or ester forming radical and B is an oxide or sulphide radical or a divalent salt or ester forming radical. Examples of suitable tin compounds are: tri-n-propyltin acetate, tri - n - butyltin acetate, bis - (tri - n - butyltin) maleate, bis - (tri - n - butyltin) oxide and tri - n - butyltin chloride. The epoxy resin may comprise 5-95% by wt. of the total of resin and pitch and the organotin compound from 5-20% by wt. of the composition. 113,268. Billner, K. P. Feb. 3, 1917, [Convention date]. Slab floors; joist floors with slab filling : reinforced-concrete floors; arches and domes.-A floor consists of shallow cupolas or domes 1 made of reinforced concrete and having substantially the same shape at the upper and lower faces, and a top filling 5 of ash or the like. The cupolas are circular or elliptical in shape and are supported by the walls or girders 2, 3. The corners are filled in with slabs 4 either cast in situ or made beforehand.