Different Types of Timber Grading

Topics Covered


Types of Timber Grading


Timber grading is the process by which timber is sorted into groups with ideally, similar appearance or structural properties in each group. Inevitably there is a range of properties within a group and significant overlap in properties between the groups.

Timber is specified by its grade, so it is important to understand the terms used in grading, and the implied properties and characteristics of each grade.

The sorting of appearance products is quite different to the sorting used for structural products. The two different set of criteria are treated separately in this section. As there may be cases where the timber has both appearance characteristics and structural properties, it is important that all users of timber understand the implications of both types of grades.

Types of Timber Grading

•        Appearance grading

•        Structural grading

•        Visual stress grading

•        Machine stress grading

•        Machine proof grading

•        In-grade testing

•        Stress grades

•        Quality control

Source: The Forest and Wood Products Research and Development Corporation

For more information on this source please visit The Forest and Wood Products Research and Development Corporation


Please use one of the following formats to cite this article in your essay, paper or report:

  • APA

    Wavin. (2017, July 14). Different Types of Timber Grading. AZoBuild. Retrieved on February 24, 2024 from https://www.azobuild.com/article.aspx?ArticleID=7969.

  • MLA

    Wavin. "Different Types of Timber Grading". AZoBuild. 24 February 2024. <https://www.azobuild.com/article.aspx?ArticleID=7969>.

  • Chicago

    Wavin. "Different Types of Timber Grading". AZoBuild. https://www.azobuild.com/article.aspx?ArticleID=7969. (accessed February 24, 2024).

  • Harvard

    Wavin. 2017. Different Types of Timber Grading. AZoBuild, viewed 24 February 2024, https://www.azobuild.com/article.aspx?ArticleID=7969.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type
Azthena logo

AZoM.com powered by Azthena AI

Your AI Assistant finding answers from trusted AZoM content

Azthena logo with the word Azthena

Your AI Powered Scientific Assistant

Hi, I'm Azthena, you can trust me to find commercial scientific answers from AZoNetwork.com.

A few things you need to know before we start. Please read and accept to continue.

  • Use of “Azthena” is subject to the terms and conditions of use as set out by OpenAI.
  • Content provided on any AZoNetwork sites are subject to the site Terms & Conditions and Privacy Policy.
  • Large Language Models can make mistakes. Consider checking important information.

Great. Ask your question.

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.