FAQs > Strength grading and structurally graded timber
These are softwood strength classes. A strength class....
A grading stamp should have the following information on it:
Certification body logo or mark
Grader and/or company reference
Species
Standard reference
Timber condition alternatives: KD or WET
Strength class
There are guidelines for solid timber in our Timber Frame Construction Manual. For further information......
These are old strength classes that have been superdeded by the European strength classes (C16 etc).
Timber can be machine graded or visually graded. Visual grading ...
Yes.
Timber shall have a minimum cross-sectional area of 2000mm2 and a minimum thickness of 20mm. There is no maximum size.
Strength graded timber can be cross cut (i.e. not reducing the cross section of the piece) without having to re-grade either of the resulting pieces. If the grading has been....
Strength grading processes do not take into account the aesthetic appearance of the piece. Visual graders assess the size....
The grading standards require that each piece of graded timber is clearly marked with certain information. This information....
There is more information in Wood Information Sheet 4-7. TRADA Techmology also run a range of timber grading courses, these courses include softwood, hardwood and scaffold board. For more information on the wood information sheets and the courses please c
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