NBN EN 12510 : 2002

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 General requirements
  5.1 General
  5.2 Species
  5.3 Wood preparation
      5.3.1 Tree felling
      5.3.2 Handling of untreated wood
      5.3.3 Storage of untreated wood
      5.3.4 Mechanical pre-treatments
  5.4 Measurement of strength reducing characteristics
      5.4.1 General
      5.4.2 Slope of grain
      5.4.3 Rate of growth
      5.4.4 Fissures
      5.4.5 Knots and knot clusters
      5.4.6 Mechanical damage
      5.4.7 Bark pockets and rind galls
6 Visual grading
  6.1 Strength reducing characteristics
  6.2 Fixed characteristics
      6.2.1 Sources
      6.2.2 Decay and insects
      6.2.3 Included sapwood
      6.2.4 Cracks
  6.3 Variable characteristics
      6.3.1 Knots
      6.3.2 Slope of grain
      6.3.3 Heartwood
      6.3.4 Rate of growth
      6.3.5 Straightness
      6.3.6 Bark pockets and rindgalls
      6.3.7 Mechanical damage
      6.3.8 Ring and star shake
      6.3.9 Fissures
  6.4 Other characteristics
      6.4.1 Visual characteristics
      6.4.2 Other criteria
7 Marking
Annex A (informative) Examples of standards currently in use
Bibliography

Specifies the requirements for the handling and storage and the characteristics for inclusion in regional/national/local/buyer standards of visual strength grading of softwood and hardwood poles.