• Kerto® LVL

    Kerto® LVL laminated veneer lumber
  • Birch plywood

  • Spruce plywood

  • Nordic premium timber

    Nordic premium timber
  • Finnjoist i-beam

    Finnjoist i-beam
  • UK specific products

    UK specific products

Kerto® manual



January 2016

Kerto® products are manufactured according to nominal dimensions. Due to the manufacturing process there may be slight variation between the product and nominal dimensions. This slight deviation in dimensions is called tolerance. When Kerto® products leave from Kerto mill in Finland, their dimension tolerances are within the limits in Table 1 and the product moisture content is between 8-10%. Figures from 1 to 3 show the dimensions and their direction from Table 1.

Table 1: Kerto-S, Kerto-Q, Kerto-Qp and Kerto-T (moisture content 10 ± 2 %).

Size​ ​Min ​Max
Thickness ​ ​​t ≤ 27 mm​-1,0 mm+1,0 mm
​27 mm < t ≤ 57 mm​-2,0 mm​+2,0 mm
t > 57 mm​-3,0 mm​+3,0 mm
Height / Width​< 400 mm​-2,0 mm+2,0 mm​
​​≥ 400 mm​-0,50 %​+0,50 %
​​Length​all​-5,0 mm​+5,0 mm
​Note!​Other tolerances different to the above can be agreed on a case by case basis.
​Note!​When designing Kerto products according to EN 1995 (Eurocode 5), the nominal dimensions of the product may be used unless local or national building rules and regulation stipulate how tolerances are to be taken account of.


 Kerto-S cross-section dimensions
Figure 1: Kerto-S cross-section dimensions.

Kerto-Q cross-section dimensions
Figure 2: Kerto-Q cross-section dimensions.

Kerto-T cross-section dimensions 
Figure 3: Kerto-T cross-section dimensions.

Note!​Moisture content affects the dimensions of Kerto products. If moisture content deviates from the initial 8-10%, the effect of it should be taken into account when comparing the actual dimensions of the product to the nominal dimensions.

More information: Moisture behaviour


This document is property of Metsäliitto Cooperative (Metsä Wood) and is only applicable when used along with products produced by Metsä Wood. Use of the document for other manufacturer's product is prohibited. Metsäliitto Cooperative is not responsible for application of documents or possible faults in documents. This clausul must not be removed. Metsä Wood and Kerto are registered trademarks of Metsäliitto Cooperative (Metsä Wood).


Kerto® LVL product pages

Applications for Kerto® LVL

  • Wood wall structures

  • Wood roofing

  • Wood flooring

  • Timber frames

  • Multi-storey timber frame system

  • Scaffolding and working platforms

  • Pre-fab industry

  • Kerto® LVL railway crossing panels

  • Prefabricated wood elements

  • Wooden multi-storey buildings