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A truss is a tight bundle of hay or straw. It would usually be cuboid, for storage or shipping, and would either be harvested into such bundles or cut from a large rick. ==Markets and law== Hay and straw were important commodities in the pre-industrial era. Hay was required as fodder for animals, especially horses, and straw was used for a variety of purposes including bedding. In London, there were established markets for hay at Smithfield, Whitechapel and by the village of Charing, which is still now called the Haymarket. The weight of trusses was regulated by law and statutes were passed in the reigns of William and Mary, George II and George III. The latter act of 1796 established the weights as follows:In summary then, the standard weights of a truss were: * new hay, 60 pounds * old hay, 56 pounds * straw, 36 pounds and 36 trusses made up a load. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Truss (unit)」の詳細全文を読む スポンサード リンク
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