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DS/INSTA 142

Nordic visual strength grading rules for timber

active, Most Current
Organization: DS
Publication Date: 18 June 2009
Status: active
Page Count: 66
ICS Code (Wood, sawlogs and sawn timber): 79.040
ICS Code (Timber structures): 91.080.20
scope:

This INSTA Standard identifies the characteristics and defines grading specifications for visual strength grading of sawn timber to be used for load-bearing structural purposes. This INSTA standard fulfills the principles of EN 14081-1 for CE marking. This INSTA covers the species defined in Annex A1 and grown in the geographical areas defined in the same annex. Defined by the dimensions and intended use of the timber, three different sets of requirements are given. They are for: - timber with thickness t ? 45 mm or width b > 75 mm (cf. clause 6.2.2). - timber with thickness 25 mm ? t ? 45 mm and width 50 mm ? b ? 75 mm. Provisions for the grades T2 and T1 only (cf. clause 6.2.3). - timber with thickness t ? 50 mm for the manufacture of glued laminated timber (cf. clause 6.2.4). NOTE: For requirements concerning treated timber see EN 14081-1 and EN 15228.

Document History

DS/INSTA 142
June 18, 2009
Nordic visual strength grading rules for timber
This INSTA Standard identifies the characteristics and defines grading specifications for visual strength grading of sawn timber to be used for load-bearing structural purposes. This INSTA standard...
Visual strength grading of Nordic T- and LT-timber
This INSTA Standard identifies the characteristics and defines grading specifications for visual strength grading of sawn timber to be used for load-bearing structural purposes. A piece of timber...

References

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