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Lumber - Weights

Weights of green, kiln dried and pressure treated lumber boards.

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The density and weight of lumber varies with the water or moisture content in the wood. Typical weights for green, kiln dried and pressure treated lumber boards are indicated in the tables below.

Note that nominal dimensions are not the same as actual lumber dimensions.

Green Lumber Boards

Weight (lb) Load Calculator!
Nominal Dimension (in x in)	Length (ft) Load Calculator!
Nominal Dimension (in x in)	1	8	10	12	16
2 x 4	1.7	13	17	20	27
4 x 4	3.6	29	36	43	58
4 x 6	5.4	43	54	65	86
4 x 8	7.2	58	72	86	115
4 x 10	9	72	90	108	144
4 x 12	10.8	86	108	130	173
6 x 6	8.1	65	81	97	130

Drying lumber takes time. Smaller and shorter boards use considerable less time than larger and longer boards. For larger pieces natural drying takes months and often even more than a year - depending on the surrounding temperature, moisture and air circulation. Smaller shorter pieces can dry in weeks.

Moisture content in wood

Kiln Dried Lumber Boards

Weight (lb) Load Calculator!
Nominal Dimension (in x in)	Length (ft) Load Calculator!
Nominal Dimension (in x in)	1	8	10	12	16
2 x 4	1.3	11	13	16	21
2 x 6	2	16	20	24	32
2 x 8	2.7	21	27	32	43
2 x 10	3.3	27	33	40	53
2 x 12	4	32	40	48	64

Right click the chart and open in new window for printing

Example - Estimating Shipment Weight of Lumber

The shipment weight of 600 ft 2 x 4 dried lumber can be estimated from the chart to be approximately

800 lb

Pressure Treated Lumber Boards

Pressure treated with chemical preservatives.

Weight (lb) Load Calculator!
Nominal Dimension (in x in)	Length (ft) Load Calculator!
Nominal Dimension (in x in)	1	8	10	12	16
2 x 4	2.1	17	21	26	34
2 x 6	3.2	26	32	38	51
2 x 8	4.4	35	44	53	70
2 x 10	5.5	44	55	66	88
2 x 12	6.6	53	66	79	106
4 x 4	4.8	38	48	58	77
4 x 6	7	56	70	84	112
4 x 8	9.3	75	93	112	149
4 x10	11.7	93	117	140	187
4 x 12	14	112	140	168	224

Right click the chart and open in new window for printing

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Related Topics

Material Properties - Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.

Related Documents

Board Feet Chart and Calculator - Board feet is used as a volume measurement of lumber.
Fire Wood - the Cord - The cord unit for purchasing fuel wood.
Machine Stress Rated (MSR) and Machine Evaluated (MEL) Lumber - Grading of lumber in North America
Softwood Lumber - Dimensions - Commercial softwood lumber dimension chart - nominal and actual sizes.
Softwood Lumber - Grading - Rough lumber, surfaced lumber (dressed), worked lumber, shop and factory lumber and yard lumber.
Softwood Lumber - Standard Sizes - Nominal and minimum-dressed lumber sizes.
Structural Lumber - Section Sizes - Basic size, area, moments of inertia and section modulus for timber - metric units.
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US Wood Screws - Pilot Holes - Hard wood and soft wood pilot holes, shank clearance holes and countersink diameters.
Wood - Combustion Heat Values - Combustion of wood and firewood heat values for species like Pine, Elm, Hickory and more.
Wood - Compressive Strength vs. Moisture Content - Red Spruce, Longleaf Pine and Douglas Fir - moisture content and their compressive strength.
Wood - Densities of Various Species - Densities of various wood species - apple, ash, cedar, elm and more.
Wood - Density vs. Moisture Content - The density of wood versus moisture content.
Wood and Bio Mass - Combustion Heat - Combustion heat values for wet and dry wood - Btu/pounds, kJ/kg and kcal/kg.
Wood Beams - Strength of Material - Bending and compression strength of wood species used in beams.
Wood Hardness - Soft and hardwood - the Janka Hardness scale.
Wood Headers - Max. Supported Weight - Weight supported by a double or triple wood headers.
Wood, Panel and Structural Timber Products - Mechanical Properties - Density, fibre stress, compressive strength and modulus of elasticity of clear wood, panel and structural timber products.

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