BS EN 14081-2:2018 pdf free.Timber structures – Strength graded structuraltimber with rectangular cross section Machine grading; additional requirements for type testing.
BS EN 14081-2 This document specifies requirements, additional to those of EN 14081-1, for type testing of machinegraded structural timber with rectangular cross-sections shaped by sawing, planning or other methods,and having deviations from the target sizes corresponding to EN 336. This includes requirements forstrength grading machines.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.EN 384,Structural timber —Determination of characteristic values of mechanical properties and densityEN 408,Timber structures – Structural timber and glued laminated timber —Determination of somephysical and mechanical properties
EN 14358,Timber structures — Calculation and verification of characteristic valuesEN 13556,Round and sawn timber — Nomenclature of timbers used in Europe
EN ISO 3166-1,Codes for the representation of names of countries and their subdivisions — Part 1:Countrycodes.
For the purposes of this document, the following terms and definitions apply.
assigned grade grade to which a piece of timber is assigned when using the appropriate setting for that specific grade.
characteristic value:representative value of a material property used for design, which is based either on 5-percentile values(e.g. strength properties and density) or on a mean value (e.g. modulus of elasticity)
critical feed speed speed, within the intended usable range, at which the grading machine is least accurate in measuring itsindicating property. depth in the case of bending, the cross sectional dimension parallel to the direction of loading, and in the caseof tension, the width.indicating property (IP) measurement or combination of measurements made by the grading machine, used in estimating one ormore of the grade determining properties, and upon which the settings are based.
optimum grade grade to which a piece of timber is assigned, such that the highest possible yield is obtained in the highesgrade when using the GDPs as the indicating properties.BS EN 14081-2 pdf download.