EN 942:2007 – Timber in joinery – General requirements
1 Scope
This European Standard specifies the general requirements including in particular the grading and classification by appearance quality of timber in joinery products or individual joinery parts.
This European Standard is intended to be used at the time of manufacture of a product. However this Standard may be used to evaluate products at a later stage, but in these situations storage and service conditions, subsequent to manufacture, shall be taken into account (surface checks).
Where European product standards exist their timber requirements shall take precedence, unless an alternative improved specification is given as identified in Annex D. If reference to this European Standard is made the specific grade and requirements shall be identified.
This European Standard covers solid, finger-jointed, end-jointed, edge-jointed and laminated timber products.
Matters relating to the influence of timber characteristics on strength and durability are not covered in this Standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 350-2, Durability of wood and wood-based products – Natural durability of solid wood – Part 2: Guide to natural durability and treatability of selected wood species of importance in Europe.
EN 844-3:1995, Round and sawn timber – Terminology – Part 3: General terms related to sawn timber
EN 1310, Round and sawn timber – Method of measurement of features
EN 13183-1, Moisture content of a piece of sawn timber – Part 1: Determination by oven dry method
EN 13183-2, Moisture content of a piece of sawn timber – Part 2: Estimation by electrical resistance method
EN 13183-3, Moisture content of a piece of sawn timber – Part 3: Estimation by capacitance method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 844-3:1995 and the following apply.
3.1
joinery
wood and wood-based products graded for non-structural use within a building
NOTE These grading rules do not apply to wood-based panels covered by EN 13986.
3.2
concealed face
face of a joinery part which, after installation of the joinery is completed, is permanently concealed by other parts of the joinery product, by other parts or by other elements including sheet materials such as veneer, solid plastic or metal
NOTE These faces may be visible before the product is installed.
3.3
semi-concealed face
visible face of a joinery part which cannot be viewed when the product is in the closed position
3.4
visible face
face of a joinery part which, after installation of the joinery is completed, is not permanently concealed or semiconcealed
NOTE 1 An opaque paint finish, does not constitute concealment.
NOTE 2 Faces which are visible when moving parts (e.g. shutters) are open are classified as semi-concealed.
EN 942:2007 – Timber in joinery – General requirements