Douglas Fir Lumber Properties

The wood is also resistant against fungal and insect infestation and exhibits good natural durability when exposed to the elements.

Douglas fir lumber properties. The machine is easy to work with douglas fir wood. Engineering properties structural lumber douglas fir larch hem fir spruce pine fir. Elastic ratios for various wood species at approximately 12 moisture content see bottom of webpage. Douglas fir is the type of fir most favored by builders of residential and small commercial buildings industrial and multi level structures and bridges.

Maximum floor joist span no. Properties of lumber products by roland hernandez and david w. Douglas fir larch select structural 1 500 1 000 180 625 1 700 1 900 000 wclib no. This wood native to the pacific.

It is strong and elastic. Machine stress rated msr and machine evaluated mel lumber grading of lumber in north america. Lumber weights weights of green kiln dried and pressure treated lumber boards. Civil engineering and design engineering material properties.

Douglas fir is technically not a true fir abies genus but is in its own genus. Excellent screw and nail holding. The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. Good strength and practicality.

Properties of lumber products 6 121. Curving grows well on this wood. Properties the wood of the douglas fir is medium weight and in comparison to other coniferous woods fairly hard. 2 grade of douglas fir and maximum span floor joists imperial units.

Visual grading and machine. Both have the same wood properties although interior douglas fir is less permeable to preservative treatments. Related lumber wood engineering data. 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.

Having the right amount of moisture. 1 1 000 675 180 625 1 500 1 700 000. Modulus of elasticity also referred to as tensile modulus or young s modulus. Modulus of elasticity of wood wood engineering design data.

1 and better 2 4 thick 1 200 800 180 625 1 550 1 800 000 wwpa no. Central city surrey photo credit. The following table is structural lumber wood engineering properties. It is subject to low shrinkage and has good stability.

Engineering properties of visually graded structural lumber douglas fir larch hem fir spruce pine fir. Douglas fir timber properties. As we know douglas fir wood is the perfect wood for wooden work. Douglas fir wood uses.