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Precast beams used in slatted flooring in cattle sheds were heretofore designed for each to carry the whole widely-varying live load, and are both bulky and expensive as a result. The paper presents a method for linking separate slats with a view to distributing the live load. Tests have shown that this results in sharing of the load, thereby permitting considerable saving in dimensions, weight, and rein-forcement. [ABSTRACT FROM AUTHOR]