Douglas Fir Lumber Properties

As we know douglas fir wood is the perfect wood for wooden work.

Douglas fir lumber properties.

Central city surrey photo credit. 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 is the type of fir most favored by builders of residential and small commercial buildings industrial and multi level structures and bridges. Properties of lumber products by roland hernandez and david w.

It is strong and elastic. 2 grade of douglas fir and maximum span floor joists imperial units. 1 and better 2 4 thick 1 200 800 180 625 1 550 1 800 000 wwpa no. Douglas fir wood uses.

Civil engineering and design engineering material properties. Engineering properties of visually graded structural lumber douglas fir larch hem fir spruce pine fir. 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. Excellent screw and nail holding.

This wood native to the pacific. Maximum floor joist span no. Elastic ratios for various wood species at approximately 12 moisture content see bottom of webpage. It is subject to low shrinkage and has good stability.

Having the right amount of moisture. Both have the same wood properties although interior douglas fir is less permeable to preservative treatments. Related lumber wood engineering data. 1 1 000 675 180 625 1 500 1 700 000.

Douglas fir is technically not a true fir abies genus but is in its own genus. The machine is easy to work with douglas fir wood. Curving grows well on this wood. 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.

Machine stress rated msr and machine evaluated mel lumber grading of lumber in north america. Modulus of elasticity also referred to as tensile modulus or young s modulus. Lumber weights weights of green kiln dried and pressure treated lumber boards. The wood is also resistant against fungal and insect infestation and exhibits good natural durability when exposed to the elements.

Visual grading and machine. Douglas fir larch select structural 1 500 1 000 180 625 1 700 1 900 000 wclib no. The following table is structural lumber wood engineering properties. Stress graded structural lumber is produced under two systems.

Modulus of elasticity of wood wood engineering design data. Properties of lumber products 6 121. The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. Good strength and practicality.