Douglas Fir Lumber Properties

Curving grows well on this wood.

Douglas fir lumber properties.

As we know douglas fir wood is the perfect wood for wooden work. Engineering properties structural lumber douglas fir larch hem fir spruce pine fir. 1 and better 2 4 thick 1 200 800 180 625 1 550 1 800 000 wwpa no. Related lumber wood engineering data.

2 grade of douglas fir and maximum span floor joists imperial units. Maximum floor joist span no. The machine is easy to work with douglas fir wood. It is subject to low shrinkage and has good stability.

Douglas fir larch select structural 1 500 1 000 180 625 1 700 1 900 000 wclib no. Stress graded structural lumber is produced under two systems. Coastal douglas fir is a much bigger tree than the interior species and it is generally lighter in colour with a more uniform texture. Lumber weights weights of green kiln dried and pressure treated lumber boards.

It is strong and elastic. Central city surrey photo credit. Engineering properties of visually graded structural lumber douglas fir larch hem fir spruce pine fir. Properties of lumber products by roland hernandez and david w.

Lumber design values design values provided herein are for western softwood species manufactured and shipped by mills in the 12 contiguous western states and alaska. Douglas fir timber properties. Douglas fir is technically not a true fir abies genus but is in its own genus. Modulus of elasticity of wood wood engineering design data.

The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. Properties the wood of the douglas fir is medium weight and in comparison to other coniferous woods fairly hard. The wood is also resistant against fungal and insect infestation and exhibits good natural durability when exposed to the elements. Having the right amount of moisture.

Properties of lumber products 6 121. Good strength and practicality. Modulus of elasticity also referred to as tensile modulus or young s modulus. Civil engineering and design engineering material properties.

Machine stress rated msr and machine evaluated mel lumber grading of lumber in north america. 1 1 000 675 180 625 1 500 1 700 000. The following table is structural lumber wood engineering properties. This wood native to the pacific.

Douglas fir is the type of fir most favored by builders of residential and small commercial buildings industrial and multi level structures and bridges. Both have the same wood properties although interior douglas fir is less permeable to preservative treatments. Except as otherwise noted the values are computed in accordance with astm standards based on clear wood tests or on tests of full size pieces in specific grades. Excellent screw and nail holding.