Physics:Petrograd Standard

Petrograd Standard is an old Nordic measure for softwood timber. It measures 165 cubic feet (4.672 m³), whereas a "London Standard" measures 270 cubic feet (7.646 m³). 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 "1,000 bd ft (2.360 m³)" 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 216 cubic feet (6.116 m³).

• 1 standard of board equals 165 cubic feet or 1,980 board feet or 4.672 cubic metres, or 120 pieces 12 in × 11 in × ​1 ¹⁄₂ in, or 165.0 cubic feet (4.672 m³).
• 1 standard of round wood equals 120 cubic feet or 3.4 cubic metres

Note that the Kristiania Standard is ​⁵⁄₈ of Petrograd Standard (103.125 cubic feet or 2.9202 cubic metres), and the London Standard is 270 cu ft (7.646 m³). The name Petrograd Standard may derive from Petrograd.