Items tagged with WOOD Files

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Testing durability of treated wood according to EN 252 - Interpretation of data from Nordic test fields (NT TR 591)

NT TR 591

  • To evaluate the effectiveness of new wood preservatives intended for treated wood in ground use there is an European standard, EN 252. The test shall run for five years before any interpretation of the results can be made.

File size: 3.47 MB Download

Korrosjonspåvirkning fra brannimpregnert trevirke - En ringtest og ny prøvemetode (NT TR 546)

NT TR 546

  • En akselerert metode for å vurdere korrosjonspåvirkningen fra brannimpregnert tre på festemidler er testet ut ved å eksponere prøvene i et fuktig klima (RF = 90 %) ved 27 °C og sammenlikne med korrosjon i utendørs eksponering i ett år.

File size: 47.71 KB Download

Hygroscopic properties of fire-retardant treated wood and wood-based products (NT BUILD 504)


  • This test method prescribes the procedure for determining the equilibrium moisture content of fire-retardant treated (FRT) wood and wood-based product samples after exposure to a standard high relative humidity condition of 90 ± 3% at 27 ± 2°C.

File size: 960.45 KB Download

Wood: Fracture energy in tension perpendicular to the grain (NT BUILD 422)


  • This standard specifies a method for determining the fracture energy of wood in tension perpendicular to the grain (mode I).

File size: 54.90 KB Download

Building materials, wood: Moisture content (NT BUILD 420)


  • This Nordtest method describes a method for measuring the moisture content of wood. Since it utilizes wooden probes with built-in electrodes which are embedded in wooden parts of building constructions where they can be left, it is very suitable for measurements over longer periods.

File size: 136.34 KB Download

Light-weight beams of wood: Loadbearing capacity and rigidity (NT BUILD 327)


  • Light-weight beams of wood are used in buildings in joists, purlins and trusses, etc. They are primarily subjected to static bending, shear forces and concentrated loads at the supports.

File size: 50.77 KB Download

Building materials, wood: Moisture content (NT BUILD 302)


  • This NORDTEST method describes a procedure for measuring the moisture content in wood by means of electrical moisture meters. The method is based on the observation that the electrical resistance between two electrodes punched into a piece of wood is a function of the moisture content in the wood.


Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.