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[Industry Knowledge] Quantity Definitions and Conversions

 Quantity Definitions & Conversions around The Timber Trade The Formulas of the Experts: Unit or Measure Formula or Conversian Factor/s Usual use Countries using Foot Board Measure (BF, MBF, FBM) = 12 in. * 12 in. * 1 in. = 1/12th cubic foot 1,980 FBM = 1 standard (of 165 cubic foot). 1,000 FBM = 83.3 cubic feet = 2.36 cubic metres = 0.505 standards Log and Lumber (sawn timber) measure North America Doyle Measure (DM, DF, MDF) Method: A deduction of 4 inches from diameter is made for slabs. Volume:  Length(ft) * (diameter(ins) - 4 ins.)² / 16 = board feet Board feet measure that can be produced from good log North America Cubic metre (cbm, m3) = 35.315 cubic feet = 423.728 board feet (12 ins.*12 ins.*1 in.) of sawn wood = 0.214 standards (of 165 cubic feet) of sawn wood = 35.315 cubic feet of roundwood (Hoppus 113 measure) = 27.72 Hoppus cubic feet of roundwood (Hoppus 144 measure) Continental log and timber measure and timber statistics issued by european countries Europe and other countries Circumference (girth) Measurement (cbm, m3) Method: "True content of cylinder". The length and mid-circumference of the log are measured Formular: Radius² * Pi (3.1416) * length Volume: Circumference / 3.1416 / 2 = (Radius)² * 3.14 * length = m3 (cbm) Example: 1st. step:  203cm(circumf.) / 3.1416(Pi) =64.6cm(diameter) 2nd.step: 0.647 m / 2 = 0.324 m (radius) 3rd. step:  0.324 m (Radius) * 0.324 m (Radius)                  * 3.1416 (PI) * 3.30 m (length)                  = 1.088 m3 (cubic metre) volume Continental log measure Europe, Germany and other countries Diameter measurement (cbm, m3) Method: "True content of cylinder". The length and mid-diameter of the log are measured Formular: Radius² * Pi (3.1416) * length Volume: diameter / 2   = (Radius)²  *  3.1416  *  length  =  m3 (cbm) Example: 1st. step:  0.647 m (diameter) / 2 = 0.324 m (radius) 2nd. step:  0.324 m (Radius) * 0.324 m (Radius)                  * 3.1416 (PI) * 3.30 m (length)                  = 1.088 m3 (cubic metre) volume Continental log measure Europe, Germany and other countries Festmeter (fm) similar to" true content of cylinder" method of circumference measurement and/or diameter measurement =      1 cubic metre of roundwood felled,     or 1 cubic metre of  standing timber. Continental log measure Germany cubic metre (cbm, m3) Method: The thickness,  length and mid-width of the board are mesasured, mid-width includes half of the edges of unedged boards. Volume: thickness * length * width = m3 (cbm) Example: 0.052 m (thick) * 3.10 m (length) * 0.26 m (width)  = 0.042 m3 (cbm) Unedged lumber measure cubic metre (cbm, m3) Method: The thickness,  length and width of the paralleledged board are mesasured. Volume: thickness * length * width = m3 (cbm) Example: 0.052 cm (thick) * 3.10 m (length) * 0.26 m (width)  = 0.042 m3 (cbm) Edged lumber measure inch (english) = 25.4 mm = 2.54 cm = 0.0254 metre foot (english) = 304.8 mm = 30.48 cm = 0.3048 metre metre (m) = 1000 mm = 100 cm = 1 metre Board Feet 1,000 Board Feet ( 1 MBF) = 2.36 m3 (cbm)

Source: Hanbao

Posted and edited by Ran, Hanbao News Department

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