Douglas Fir Lumber Grades

Douglas fir it is very strong and is less prone to warping and spitting than syp.

Douglas fir lumber grades.

All pictures are meant for a general grade description. Hem fir western. Df doors manufactured from products in the factory shop grade classification are renowned for their beauty and performance. Standard grading guides for northeastern lumber.

General definitions and instructions for grading eastern white pine boards. Interpreting a grade stamp. 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. Predominant material found in western u s.

The picture shown above is an example of super high end select structural grade douglas fir. It encompasses a group of western species. Eastern white pine northeastern lumber manufacturers association. The 5 grades of eastern white pine grade photo sheet hem fir.

These depend on various factors like the type of wood used and the number and types of defects if any. Sapwood is white to pale yellow. Hem fir it is weaker and more prone to warping and splitting than douglas fir but more receptive to preservation. Grading is by visual inspection and is a judgment of appearance and suitability to end use rather than of strength.

The tree itself grows to be very large and yields a large amount of usable lumber and veneer for plywood. Potter commissioned the recycled beams from an old barn in eastern wa. Douglas fir is technically not a true fir abies genus but is in its own genus. The country clinic the clinic was built by jerry laverty and laverty construction a longtime customer.

Douglas fir s light rosy color is set off by its remarkably straight and handsome grain pattern. Western wood products association 1500 sw first ave. An overview of lumber grades and wood quality. It is an incredibly valuable commercial timber widely used in construction and building purposes.

The wood siding shown in this picture is select tight knot channel that was also. Heartwood is russet with high contrast between the springwood and summerwood. Limitations of the nhla grading system. 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.

First and most significantly the nhla grading system as its name implies is limited to domestic hardwood lumber. The lumber grades in this category are intended for applications where strength is not the primary consideration. 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 mountaintop home a combination of douglas fir larch and western red cedar give this home a timeless western charm.