F. Padovani
Fuelwood may come in many
forms – stacks, bundles, baskets and headloads. Industrial roundwood is
measured in the log (overbark or underbark); different measurement conventions
and various rounding conventions are used. When measured by weight, moisture
content is assessed. The measurement of sawnwood and wood-based panels is
simpler because the products are regular in shape, but some measurement and
rounding conventions may apply. Pulp is measured by weight and moisture content
is calculated. Paper is measured by weight.
Standard conversions to
metric measures are attached (Table 1), together with some approximate
equivalents to forest measures and weight (Tables 2, 3 and 4). Because of the
particular importance of wood as an energy source in Asian countries,
approximate conversions from volume and weight to units of energy content are
given in Table 5.
|
Units/unités/unidades |
Metric equivalent/equivalents en
unités métriques/
equivalents en unidades metricas |
|
1 inch/pouce/puigada |
= 25.4 millimetres/millimetres/milimetros |
|
1 square foot/pied
carré/pie cuadrado |
= 0.0929 square metre/mètre carré/metro
cuadrado |
|
1 cubic foot/pied
cube/pie cubico |
= 0.02832 cubic metre/mètre cube/metro
cubico |
|
1 short ton/tonne
courte/tonelada corta |
= 0.9072 metric tonne/tonne
métrique/tonelada metrica |
|
1 long ton/tonne
longue/tonelada larga |
= 1.016 metric tonne/tonne métrique/tonelada
metrica |
Table 2.
Approximate equivalents for forest measures
Table 3.
Forest
product measures
|
Product and
unit Produits et
unités Productos y
unidades |
Cubic metres Mètres cubes Metros cubicos |
Cubic feet Pieds cubes Pies cubicos |
1 000 board feet Pieds planches Pies madereros |
Standard (Petrograd) |
|
Roundwood/bois
rond/madera en rollo |
||||
|
1 hoppus cubic foot/1 pied cube hoppus/1 pie cubico
hoppus |
0.03605 |
1.273 |
||
|
1 ton of 5 hoppus cubic feet/1 tonne de 50 pieds cubes
hoppus/1 tonelada de 50 pies cubicos hoppus |
1.8027 |
63.66 |
||
|
283.16 |
100 |
|||
|
1 cord1/1corde1/1cuerda1 |
3.625 |
128 |
||
|
1 stere1/1stère1/1estero1 |
1 |
35.315 |
||
|
1 fathom1 |
6.1164 |
216 |
||
|
Sawnwood/sciages/madera
aserrada |
||||
|
1 standard (Petrograd) |
4.672 |
165 |
1.98 |
1 |
|
1 000 board super feet2/1 000 pieds planches
superficiels2/ 1 000 pies madereros superficiales2 |
236 |
83.33 |
1 |
0.505 |
|
1 ton of 50 cubic feet/1 tonne de 50 pieds cubes/1 tonelada
de 50 pies cubicos |
1.416 |
50 |
0.6 |
0.303 |
|
Panels/panneaux/tableros |
||||
|
1 000 square metres (1 millimetre thickness) 1 000 mètres carrés (1 millimètre d’épaisseur) 1 000 metros cuadrados (1 milimetro de espesor) |
1 |
35.315 |
0.4238 |
|
|
1 000 square feet (1.8 inch thickness) 1 000 pieds carrés (1.8 de pouce d’épaisseur) 1 000 pies cuadrados (1.8 de pulpaca de espesor) |
0.295 |
10.417 |
0.125 |
1
Stacked
volume/volume empilé/volumen hacinado.
2 See “Notes on the Tables” in the Yearbook
of forest products/voir les “Notes sur les tableaux” dans l’Annuaire des produits forestiers/véanse
las “Notas sobre los Cuadros” en el Anuario
de los productos forestale
Table 4.
Weight and volume
Product
|
kg/CUM |
CUM/MT |
||||
Produits
|
G |
C |
NC
|
G |
C |
NC |
| Fuelwood/bois de chauffage/leña |
725 |
625 |
750 |
1.38 |
1.60 |
1.33 |
|
Charcoal/charbon de
bois/carbon veg |
167 |
|||||
|
Sawlogs –
veneer logs/grumes, sciages + placage/trozas, aserrada + chapas |
|
|||||
|
Tropical/tropicale/tropicales |
730 |
1.37 |
||||
|
Other/autres/otras |
700 |
800 |
1.43 |
1.25 |
||
|
Pitprops/bois de
mine/madera para minas |
725 |
700 |
800 |
1.38 |
1.43 |
1.25 |
|
Pulpwood/bois
de trituration/madera para pulpa |
675 |
650 |
750 |
1.48 |
1.54 |
1.33 |
|
Other
industrial roundwood/autre bois rond industrial/otras maderas en rollo
industrial |
750 |
700 |
800 |
1.33 |
1.43 |
1.25 |
|
Sawnwood/sciages/madera
aserrada |
550 |
700 |
1.82 |
1.48 |
||
|
Sleepers/traverses/traviesas |
780 |
1.28 |
||||
|
Veneer sheets/feuilles de
placage/hojas de chapa |
750 |
1.33 |
||||
|
Plywood/contreplaque/madera
terciada |
650 |
1.54 |
||||
|
Particle
board/panneaux de particules/tableros de particulas |
650 |
1.64 |
|
|||
|
Fibreboard
compressed/panneaux fibres durs/tableros fibra, prensados |
950 |
1.053 |
||||
|
2 |
||||||
|
Insulating
board/panneaux fibres isolants/tableros fibra aislantes |
250 |
4 |
||||
Note: G =
general/general/universal; C = coniferous/conifers/coniferas; NC =
non-coniferous/non-conifères/no-coniferas
Table 5.
Fuelwood and charcoal energy equivalents
|
MTCE |
Giga- joules (10°) |
Giga calories (10°) |
||
|
1 MT anthracite |
1.0 |
31.4 |
7.0 |
0.70 |
|
1 MT coal |
1.0 |
31.4 |
7.0 |
0.70 |
|
1 MT lignite |
0.67 |
21.6 |
4.8 |
0.48 |
|
1 MT coke (BR) |
0.81 |
28.5 |
7.0 |
0.70 |
|
1 MT gasoline |
1.50 |
44.0 |
10.5 |
1.05 |
|
1 MT charcoal |
0.99 |
28.9 |
6.9 |
0.69 |
|
1 MT wood (20–30% mc) |
0.5 |
14.3 |
3.5 |
0.35 |
|
1 MT wood (green) |
0.35 |
10.0 |
2.5 |
0.25 |
|
0.33 |
9.4 |
2.6 |
0.26 |
|
|
1 m3
fuelwood (solid 0% mc) |
0.43 |
14.0 |
3.4 |
0.34 |
|
1 m3
fuelwood (solid green) |
7.2 |
1.8 |
0.18 |
|
|
1 m3
fuelwood (piled) |
0.18 |
5.0 |
1.2 |
0.12 |
|
0.50 |
14.3 |
3.5 |
0.35 |
|
|
1 MT dung cakes |
0.30 |
8.6 |
2.1 |
0.21 |
|
1 MT ethyl alcohol |
0.94 |
27.6 |
6.6 |
0.66 |
|
1 MT sawdust |
0.39 |
11.1 |
2.7 |
0.27 |
|
1 MT crude oil |
1.46 |
42.7 |
10.2 |
1.00 |
Note: 1 MT crude oil = 7.30
bb (barrels); MTCE = metric tonne coal equivalent; 1 MTCE = 0.68 bb crude
oil; MTOE = metric tonne oil
equivalent; 1 MTOE = 5 bb crude oil; mc =
moisture content; 1 m3 fuelwood = 1.6 bb crude oil
