Douglas Fir Lumber Properties

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 lumber properties.

Elastic ratios for various wood species at approximately 12 moisture content see bottom of webpage. Civil engineering and design engineering material properties. Douglas fir larch select structural 1 500 1 000 180 625 1 700 1 900 000 wclib no. Engineering properties of visually graded structural lumber douglas fir larch hem fir spruce pine fir.

The following table is structural lumber wood engineering properties. The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. Modulus of elasticity of wood wood engineering design data. Machine stress rated msr and machine evaluated mel lumber grading of lumber in north america.

Engineering properties structural lumber douglas fir larch hem fir spruce pine fir. Properties of lumber products 6 121. Coastal douglas fir is a much bigger tree than the interior species and it is generally lighter in colour with a more uniform texture. Douglas fir wood uses.

Modulus of elasticity also referred to as tensile modulus or young s modulus. Stress graded structural lumber is produced under two systems. Douglas fir is the type of fir most favored by builders of residential and small commercial buildings industrial and multi level structures and bridges. Visual grading and machine.

This wood native to the pacific. Douglas fir is technically not a true fir abies genus but is in its own genus. As we know douglas fir wood is the perfect wood for wooden work. Both have the same wood properties although interior douglas fir is less permeable to preservative treatments.

Related lumber wood engineering data. 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. Central city surrey photo credit. Excellent screw and nail holding.

The wood is also resistant against fungal and insect infestation and exhibits good natural durability when exposed to the elements. 1 and better 2 4 thick 1 200 800 180 625 1 550 1 800 000 wwpa no. Lumber weights weights of green kiln dried and pressure treated lumber boards. 1 1 000 675 180 625 1 500 1 700 000.

Maximum floor joist span no. Good strength and practicality. Douglas fir timber properties. Curving grows well on this wood.

It is strong and elastic. 2 grade of douglas fir and maximum span floor joists imperial units. Properties the wood of the douglas fir is medium weight and in comparison to other coniferous woods fairly hard. It is subject to low shrinkage and has good stability.