Timber has a wide range in terms of quality and appearance, in reference to knots and grain and various natural characteristics. These different variations of quality mean that any given wood has an attributed strength, value and potential for use.
Unfortunately there isn’t a universal framework for an industry standard so there are different grading rules and industry standards in different countries. The criteria for grading is variable across the regions.
Timbersource assesses grades of timber stocked in accordance with the relevant grading authority from the country of origin and the species. However, for an appropriate premium, we can grade timber to suit your pre-defined criteria.
For our supply of 'beams' such as European Oak, either 'green' or from our stocks of 'seasoned' beamstock, we can strength-grade to the TH system using our in-house visual strength graders, providing certificated assurance that graded beams meet the standards required.
As a reference point you can always refer to the leading timber and certification and notification body in the UK, Certification And Timber Grading (CATG), which is accredited by the United Kingdom Accreditation Service.
Certification And Timber Grading (CATG) Strength Grading Rules
To complement our Oak Grading, the same graders are also qualified in softwood and tropical grading. Although many softwoods are mechanically graded at point of production, many jobs require the timber to be planed or profiled. If this is carried out then the timber concerned loses the grade. Our timber graders can regrade the wood after the work has been done, satisfying the necessary strength requirements that you may have.
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