LTV - Wood-based panels

This European Prestandard gives a calculation method for the estimation of some mechanical properties of
plywood (strength and stiffness) with a symmetrical composition.
The resulting values are intended as predictive only.

This European Standard provides information on the characteristic values for use in designing structures
incorporating wood based panels. The characteristic values given are as defined in ENV 1995-1-1.
This standard includes the characteristic values of the mechanical properties for plywood complying with EN 636 and the requirements of EN 13986 when used in a bending mode.
Advice on obtaining the characteristic values for tension and compression for plywood by either testing or calculation is provided. Conservative values for shear are also included.
Characteristic values for OSB, particleboards and fibreboards are given in EN 12369-1. A further part of the standard for characteristic values of solid wood panels is in preparation.

This European Standard specifies requirements for solid wood panels as defined in EN 12775 for use in dry, humid and exterior conditions as defined in service classes 1, 2 and 3 of EN 1995-1-1.
Additional information on supplementary properties for certain applications is also given.

This European Standard specifies the requirements for resin-bonded unfaced particleboards.
NOTE 1   This standard will be called up in EN 13986 for construction applications.
The values listed in this standard relate to product properties but they are not characteristic values to be used in design calculations.
NOTE 2   Such characteristic values (e. g. for use in design calculation in ENV 1995-1-1) are given either in EN 12369-1 or derived by testing according to EN 789, EN 1058 and ENV 1156.
Additional information on supplementary properties for certain applications is also given.
NOTE 3   Particleboards in accordance with this standard may be referred to as P1 to P7-boards.
NOTE 4   A new grade of board type P3 has been included and is intended for use as a non load-bearing board for use in humid conditions.
Boards of type P4 to P7 are intended for use in design and construction of load-bearing or stiffening building elements, e. g. walls, flooring, roofing and I-beams (see EN V 1995-1-1 and/or performance standards).
This standard does not give requirements for Oriented Strand Boards (OSB); these are set out in EN 300.
This standard does not apply to extruded particleboards.
This standard does not give requirements for Oriented Strand Boards (OSB); these are set out in EN 300.
This standard does not apply to extruded particleboards.

TC - Numerous modifications of equations throughout text

This European Standard specifies methods for both factory production control and external control of conformity of the properties of wood-based panels with the relevant EN specifications. However, it may also apply, at the option of the manufacturer, to wood-based panels applied for non-construction purposes. This European Standard is not applicable for the assessment of conformity with specifications of the properties of panels comprised in consignments. In such cases, EN 326-3 applies. For factory production control, if required, methods for the assessment of conformity of batches and of production over longer periods are given. For external control, if required, methods for the initial inspection of a factory and initial type testing of a product, and for the surveillance of the factory production control, are given. In this standard, control is based on the testing of small test pieces.

This Technical Specification specifies a test method for determining the bonding quality of single-layer and multi-layer solid wood panels by a shear test.

Migrated from Progress Sheet (TC Comment) (2000-07-10): Result of the merging of WIs 019-021, 038-040, 067 (TC Res 263/1998)(CC/981223) ++ Res. 278 : approved for FV (MB/990415)

This European Standard specifies the requirements for dry process boards (MDF) as defined in EN 316.
The values listed in this European Standard relate to product properties but they are not characteristic values to be used in design calculations.

This European Standard gives the definition, classification and symbols for wood fibreboards.

This European Standard specifies requirements for solid wood panels as defined in EN 12775 for use in dry, humid and exterior conditions as defined in service classes 1, 2 and 3 of ENV 1995-1-1:1993.
Additional information on supplementary properties for certain applications is also given.

This European Standard gives guidance on the use of wood-based panels in structural applications as structural floor and roof decking on joists or structural wall sheathing on studs in accordance with EN 12871. It provides information on: - inspection at site; - transport and delivery; - handling; - stacking; - storage; - moisture content, conditioning and the effects of moisture; - cutting and machining; - selection;
- installation.

This Standard gives guidance for the end user on the selection of plywood for application of various finishes for use in dry, humid, or exterior end-use conditions.

This European Pre-standard gives guidances on the selection of plywood for use in the different hazard classes of biological attack as defined in EN 335-1. The guidance given takes into account the natural durability classification for solid timber (see EN 350-2) together with other factors specific for plywood. It does not consider durability against chemico-physical factors, such as weathering, nor does it consider the biological durability of the adhesive.

This European Standard specifies the requirements for dry process fibreboards according to EN 316.  The values listed in this standard relate to product properties but they are not characteristic values to be used in design calculations.

This European Standard specifies methods for the verification of compliance of one or more properties of a consignment of panels with the requirements of a contract, or with the claimed values of properties of panels in a consignment as documented by the supplier. This European Standard is not applicable for the internal or external control of conformity of products in the factory. For these purposes, prEN 326-2 applies. In this standard, verification of compliance is based on the testing of small test pieces.