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EN 350 — Durability classes of heartwood against wood-destroying fungi

Annex B / Table B.1. Grades heartwood natural durability against basidiomycetes on a five-step scale: DC1 very durable, DC2 durable, DC3 moderately durable, DC4 slightly durable, DC5 not durable. Indicative field ratings: European oak DC2, western red cedar DC2–3, Siberian larch DC3, Douglas fir DC3–4, Norway spruce DC4, sapwood of all species DC5. Durability is a heartwood property only; sapwood proportion must be declared separately.

How to read this

The diagram below shows every direct connection this node has in the graph. Each line is one edge; expand a neighbour group below to read exactly why that connection exists and which standard or dataset it comes from.

EN 350 — Durability classes of heartwood against wood-destroying fungi — knowledge graph neighbourhoodNorway SpruceSiberian LarchWestern Red CedarThermally Modified AshEuropean OakAcetylated Radiata P…Douglas FirScots Pine (heartwood)Thermally Modified P…Sweet ChestnutRobinia (Black Locust)Iroko (FSC certified)EN 350 — Durability clas…

Species (12)

  • Norway Spruce← durability class from

    Declared durability class "DC 4 (slightly durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Siberian Larch← durability class from

    Declared durability class "DC 3 (moderately durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Western Red Cedar← durability class from

    Declared durability class "DC 2 (durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Thermally Modified Ash← durability class from

    Declared durability class "DC 1–2 after modification" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • European Oak← durability class from

    Declared durability class "DC 2 (durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Acetylated Radiata Pine← durability class from

    Declared durability class "DC 1 (very durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Douglas Fir← durability class from

    Declared durability class "DC 3–4 (moderately to slightly durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Scots Pine (heartwood)← durability class from

    Declared durability class "DC 3–4 heartwood; sapwood DC 5 but treatable" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Thermally Modified Pine← durability class from

    Declared durability class "DC 2–3 after modification (process dependent)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Sweet Chestnut← durability class from

    Declared durability class "DC 2 (durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Robinia (Black Locust)← durability class from

    Declared durability class "DC 1–2 (very durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

  • Iroko (FSC certified)← durability class from

    Declared durability class "DC 1–2 (very durable)" follows the EN 350 Annex B five-step scale.

    Source: en350-dc

How edges in this graph are derivedWI-GRAPH v1.0.0

Species → agent edges come from the WI-SL resistance profile (0–100 ordinal scale derived from EN 350 durability class, extractive chemistry and movement). ≥70 is read as "resists well", 45–69 as "moderately resists", below 45 as "is vulnerable to".

Climate → agent edges fire when a climate's driver value (UV, humidity, salt or freeze-thaw load) is 60 or above, read directly from the climate dataset.

Treatment → agent / standard edges come from the paraphrased standards corpus used across the site (EN 927-1, EN 351-1, EN 350 clause 4, EN 13501-1).

Species → standard edges reuse the exact source list already published for each Global WoodIntel Score sub-score.

Machine-readable: GET /api/public/v1/graph?node=standard-en350-dc · CC BY 4.0