ČSN EN 338 (731711)

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Dřevo. Kulatina na řezivo. Řezivo

Anotácia textu normy ČSN EN 338 (731711):

This European Standard establishes a system of strength classes for general use in design codes.

It gives characteristic strength and stiffness properties and density values for each class to which EN 14081 1 refers.

This standard is applicable to all softwood and hardwood timber for structural use, within the scope of EN 14081-1.

Compared to EN 338:2009, the following modifications have been made:

• - new table of strength classes for softwood species based on tension tests;
• - extension with new classes in the table of strength classes for hardwood species based on edgewise bending tests;
• - modification of some characteristic values for strength, stiffness and density;
• - equations to determine the characteristic values of other strength properties from the grade determining properties has been transferred to EN 384