What are the wood grades?

What are the wood grades?

The standard grades of hardwood lumber are:

Grade	Trade Name	Min. cutting size
Firsts and Seconds	FAS	4″ x 5′ or 3″ x 7′
FAS One Face	F1F	4″ x 5′ or 3″ x 7′
Select	SEL	4″ x 5′ or 3″ x 7
No. 1 Common	1C	4″ x 2′ or 3″ x 3′

What is F11 timber?

F11 – The stress grade classification of a piece of timber for structural purposes (to the relevant Australian Standard) to indicate its characteristic structural properties and stiffness.

What is C24 pine?

C24 boards have fewer defects than C16 graded timber and the timber is therefore stronger and more resilient than C16 boards. You will also find that C24 boards have a more uniformed and neat appearance as there are fewer physical imperfections on the surface of the board.

How are the grades of Canadian lumber determined?

Grading agencies are accredited by the CLSAB. NLGA Standard Grading Rules for Canadian Lumber provide a list of the permitted characteristics within each grade of dimension lumber. The grade of a given piece of dimension lumber is based on the visual observations of certain natural characteristics of the wood.

What kind of lumber is made in Canada?

Canadian dimension lumber is manufactured in accordance with CSA O141 Softwood Lumber and must conform to the requirements of the Canadian and US lumber grading rules.

Which is the highest grade of lumber to use?

Select Structural Lumber This is the highest grade of lumber, used for its strength and durability. You’ll find the least number of defects in this grade of lumber. Knots are permitted in certain sizes, as long as they are sound, firm, tight, and well spaced.

What are the different grades of dimension lumber?

Dimension lumber is aggregated into the following four grade categories: Structural light framing, Structural joists and planks, Light framing, and Stud. The table below shows the grades and uses for these categories.