Douglas Fir Lumber Properties

1 and better 2 4 thick 1 200 800 180 625 1 550 1 800 000 wwpa no.

Douglas fir lumber properties.

Machine stress rated msr and machine evaluated mel lumber grading of lumber in north america. Engineering properties of visually graded structural lumber douglas fir larch hem fir spruce pine fir. Douglas fir timber properties. The machine is easy to work with douglas fir wood.

It is strong and elastic. The wood is also resistant against fungal and insect infestation and exhibits good natural durability when exposed to the elements. 2 grade of douglas fir and maximum span floor joists imperial units. Engineering properties structural lumber douglas fir larch hem fir spruce pine fir.

Related lumber wood engineering data. Properties of lumber products 6 121. The following table is structural lumber wood engineering properties. 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.

Civil engineering and design engineering material properties. Excellent screw and nail holding. 1 1 000 675 180 625 1 500 1 700 000. Properties of lumber products by roland hernandez and david w.

Visual grading and machine. Having the right amount of moisture. As we know douglas fir wood is the perfect wood for wooden work. Douglas fir is the type of fir most favored by builders of residential and small commercial buildings industrial and multi level structures and bridges.

Elastic ratios for various wood species at approximately 12 moisture content see bottom of webpage. Coastal douglas fir is a much bigger tree than the interior species and it is generally lighter in colour with a more uniform texture. It is subject to low shrinkage and has good stability. Good strength and practicality.

Douglas fir wood uses. 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. Maximum floor joist span no. Both have the same wood properties although interior douglas fir is less permeable to preservative treatments.

Modulus of elasticity also referred to as tensile modulus or young s modulus. Central city surrey photo credit. Stress graded structural lumber is produced under two systems. Lumber weights weights of green kiln dried and pressure treated lumber boards.

Modulus of elasticity of wood wood engineering design data. This wood native to the pacific. Curving grows well on this wood. Douglas fir larch select structural 1 500 1 000 180 625 1 700 1 900 000 wclib no.