This Part of EN 335 defines five hazard classes which represent the different service situations to which wood and wood-based products can be exposed. This Part also indicates the biological agencies relevant to each situation.
Annex A gives information on these biological agencies.
DS/EN 335-1:1994 history
1994DS/EN 335-1:1994 Durability of wood and wood-based products. Definition of hazard classes of biological attack. Part 1: General