EN 1316-1-2012 pdf download.Hardwood round timber – Qualitative classification – Part 1 : Oak and beech.
This EN 1316-1 specifies a qualitative classification and grade designations for felled round timber of
oak and beech presented in the form of long poles or logs.
The classifications descnbe quality dasses of round timbers for which the intended use is not known.
The dassification applies for the following species: Oaks, Quercus sessiliflora SALISB. (or Quercus petraea
LIEBL.), Quercus robur L. (or Quercus pedunculata EHRH.) and Beech (Fagus sylvatica L).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 844-1:1995, Round and sawn limber — Tenmnology — Pa1 1: General terms common to round timber and sawn timber
EN 844-2:19971 Round and sawn timber — Terminology — Part 2: General terms relating to round timber
EN 844-5:1997, Round and sawn timber — Terminology — Part 5: Terms relating to dimensions of round timber
EN 844-7:1997, Round and sawn timber — Terminology — Part 7: Terms relating to anatomical structure of timber
EN 844-8:1997. Round and sawn timber — Terminology — Part 8: Terms relating to features of round timber EN 844-10:1998, Round and sawn timber — Termmology — Part 10: Terms relating to stain and fungal attack
EN 1309-2, Round and sawn timber — Method of measurement of dimensions — Part 2: Round timber — Requirements for measurement and volume calculation rules
EN 1310. Round and sawn timber — Method of measurement of features
EN 1311. Round and sawn timber— Method of measurement of biological degrade
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 844-1:1995, EN 844-2:1997, EN 844-5:1997, EN 844-7:1997, EN 844-8:1997 and EN 844-10:1998 apply.
4 Qualitative classification
4.1 Grading principles
Each long pole, log or portion of a round timber individualized by a theoretical crosscut point. is qualified according to its din,ensions and to the presence, size, and distribution (e.g. concentration) of specific features.
4.2 Designation of grades
The qualitative grading has tour classes; A, B, C and D. The grading is based on the following general description of quality classes:
Quality class A
First quality timber: generally corresponding to a butt log with clear timber or with only minor features wtiich do not restrict use.
Quality class B
Timber of average to first quality, with no specific requirements for clear wood. Knots are permitted to such an extent as is considered to be average for each species.
Quality class C
Timber of average to low quality, allowing all quality features which do not seriously reduce the natural features of the wood.
Quality class D
Timber which can be sawn into usable wood, which, because of its features, falls into none of the quality
classes A. B or C.
4.3 Features to be taken into account for the classification
The classes are defined more precisely in Table 1 for oak and Table 2 for beech. All the listed qualitative features in Table 1 and Table 2 shall be taken into account when a class is assigned and measurements shall be made according to EN 1309-2. EN 1310 and EN 1311.
In the case of one feature exceeding the limit of the class, which would lead to a downgrading, the reduction of length or diameter excluding the feature may allow to remain In this class.
This classification shall be completed with the Latin name of specified species. The abbreviation of this Latin name can also be used instead of the full name.
EXAMPLE 1 Oak: Que’ws class B or Q-B
EXAMPLE 2 Beech: Fagus class B or F-B.EN 1316-1-2012 pdf download.