General

For timber structures, the γM, Service class, the System strength factor and kcr values can be set.

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Figure: Timber material settings

Young Modulus

The following table and figures summarize the calculation of Young moduli used in different analysis types for concrete, steel and timber materials.

Analysis type Timber

Load cases,

Load group,

1st order load combination

ULS

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SLS

2nd order load combination,

Imperfection calculation

ULS

1584607952404-648.png

SLS
Stability analysis 1584608015599-618.png

Eigenfrequency calculation

Seismic analysis

 E0,mean

Table: Calculation of Young-moduli in different analysis types

Load duration classes

In the Load cases window it is possible to set the load duration class according to EN1995-1-1.

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Load-duration classOrder of accumulated duration of characteristic loadExamples of loading
PermanentMore than 10 yearsDead load
Long-term6 months – 10 yearsStorage
Medium-term1 week – 6 monthsImposed floor load, snow
Short-termless than one weekSnow, wind
Instantaneous Wind, accidental load

Table: Load-duration classes and examples of load-duration assignment (EN 1995-1-1:2004)

Created by Fredrik Lagerström on 2020/04/02 07:43
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