![]() ![]() Soft and hardwood - the Janka Hardness scale. The density of wood versus moisture content.Ĭombustion heat values for wet and dry wood - Btu/pounds, kJ/kg and kcal/kg. Red Spruce, Longleaf Pine and Douglas Fir - moisture content and their compressive strength. Height of trees commonly used in towns and urban areas.Ĭombustion of wood and firewood heat values for species like Pine, Elm, Hickory and more. Nominal and minimum-dressed lumber sizes.īasic size, area, moments of inertia and section modulus for timber - metric units. Rough lumber, surfaced lumber (dressed), worked lumber, shop and factory lumber and yard lumber. Strength classes, bending stress and mean density of hardwood and softwood Softwood and Hardwood - Structural Strength Classes Machine Stress Rated (MSR) and Machine Evaluated (MEL) LumberĬalculate miter saw protractor angles for skirting and decorative mouldings work.Īllowable withdrawal load for nail and spikes. Weights of green, kiln dried and pressure treated lumber boards. ![]() Lumber and surface finishing abbreviations. Hardwood and Softwoods - Recommended Drill Bit Speeds Specific Weight and Specific GravityĪn introduction to density, specific weight and specific gravity. Material properties of gases, fluids and solids - densities, specific heats, viscosities and more.Ĭalculate angles with a straight board across carpenter's square.īoard feet is used as a volume measurement of lumber.ĭensities of common products - Imperial and SI-units.ĭensity vs. Shrinkage will occurs as a result of the moisture loss - typical 3-4% across the grain.ĭensities of solids, liquids and gases. ![]() Seasoning is the name of the process where moisture content is reduced to the appropriate level for proposed use. Moisture content should be lower than 20% to stop fungal attack. Mass and density in the Imperial systemĪfter felling, timber will lose moisture to align itself with the atmospheric conditions. ![]()
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