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Petrograd Standard is an old Nordic measure for softwood timber. It measures , whereas a "London Standard" measures . The timber measurements also vary between Europe and the United States and also between the traditional measurement system from Northern Europe and the Metric system. In the U.S. the units of measurement are "" and in the metric system the unit is the "Stere" which is 1 cubic metre. Small logs of "fir" trees, called "pit props", are traditionally measured by the "intaken piled fathom" ("IPF"), 6 ft x 6 ft x 6 ft or .〔(Intaken measure )〕 * 1 std of board equals , or 120 pieces 12 in × 11 in × in, or . * 1 std of round wood equals Note that the Kristiania Standard is of Petrograd Standard (), and the London Standard is . The ''name Petrograd Standard'' may derive from Petrograd. == References == 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「Petrograd Standard」の詳細全文を読む スポンサード リンク
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