The accelerated L-joint test incorporates a moistening device and uses a close end water trap in an open joint connection with a laminated tenon member consisting of the perishable reference wood species scots pine sapwood and beech. After one year of exposure it is possible to show a distinct identification of natural durability classes 4 and 5 against the more durable wood species. Both weight loss estimation and the isolation of decay fungi are important criteria to evaluate the durability of tested wood. Althoughthis is not a laboratory method it indicates the possibility to use out of ground durability evaluation at short term by means of accelerated exposure under practical conditions.

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