ČSN EN 338 (731711)

Anotace 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