Douglas Fir Lumber Grades

Douglas fir s light rosy color is set off by its remarkably straight and handsome grain pattern.

Douglas fir lumber grades.

Limitations of the nhla grading system. Home species douglas fir select grade douglas fir lumber of this grade is intended primarely for use in housing and light construction where it is exposed as paneling shelving and other uses where a knotty type of lumber with the finest appearance is required. Df doors manufactured from products in the factory shop grade classification are renowned for their beauty and performance. That means of course that it does not encompass exotic hardwood species such as ipe or mahogany or softwood species such as red cedar or douglas fir.

The picture shown above is an example of super high end select structural grade douglas fir. The wood siding shown in this picture is select tight knot channel that was also. Western wood products association 1500 sw first ave. All pictures are meant for a general grade description.

It encompasses a group of western species. Sapwood is white to pale yellow. Predominant material found in western u s. General definitions and instructions for grading eastern white pine boards.

Before we get into the different grades of lumber let s take a look at the various defects you may find in a piece of lumber. Potter commissioned the recycled beams from an old barn in eastern wa. Eastern white pine northeastern lumber manufacturers association. Interpreting a grade stamp.

Grading is by visual inspection and is a judgment of appearance and suitability to end use rather than of strength. Products graded for appearance. Potter mountaintop home a combination of douglas fir larch and western red cedar give this home a timeless western charm. First and most significantly the nhla grading system as its name implies is limited to domestic hardwood lumber.

These depend on various factors like the type of wood used and the number and types of defects if any. An overview of lumber grades and wood quality. Standard grading guides for northeastern lumber. The lumber grades in this category are intended for applications where strength is not the primary consideration.

Lumber is graded based on the quality and appearance of the wood. Douglas fir it is very strong and is less prone to warping and spitting than syp. It is an incredibly valuable commercial timber widely used in construction and building purposes. The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood.

The 5 grades of eastern white pine grade photo sheet hem fir. Heartwood is russet with high contrast between the springwood and summerwood. Home species douglas fir select structural grade douglas fir select structural posts and timbers are graded primarily for strength but can be used also for good appearance. Hem fir it is weaker and more prone to warping and splitting than douglas fir but more receptive to preservation.