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FIN EC software

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Material characteristics

The material can be selected from predefined database or specified manually by the user. the database contains basic strength classes for softwood and hardwood according to EN 338, strength classes for glued laminated timber and also local timber grades in accordance with EN 1912. These characteristics are necessary for the analysis:

fm,k

  • Characteristic bending strength

ft,0,k

  • Characteristic tensile strength along the grain

fc,0,k

  • Characteristic compressive strength along the grain

fv,k

  • Characteristic shear strength

ft,90,k

  • Characteristic tensile strength perpendicular to the grain

fc,90,k

  • Characteristic compressive strength perpendicular to grain

E0,05

  • Fifth percentile value of modulus of elasticity

ρk

  • Characteristic density

The design values of material characteristics are used during the analysis. The design values are calculated by multiplication of characteristic values by modification factor kmod and division by partial factor for material properties γM. Values of γM are written in chapter "National annexes". Index of design values starts with d. Modification factor for duration of load and moisture content kmod depends on load duration and service class (table 3.1 of EN 1995-1-1).

The strength parameters in tension and bending can be increased for small cross-sections in accordance with chapter 3.2 of EN 1995-1-1. Depth factor kh according to the formula (3.1) is used for this increase.

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