Timber (Material)
Last modified by Casper Egholm Hougaard on 2024/08/26 10:20
General
For timber structures, the γM, Service class, the System strength factor and kcr values can be set.
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 |
|
| SLS | ||
2nd order load combination, Imperfection calculation | ULS |
|
| SLS | ||
| Stability analysis | E0,mean | |
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.
| Load-duration class | Order of accumulated duration of characteristic load | Examples of loading |
|---|---|---|
| Permanent | More than 10 years | Dead load |
| Long-term | 6 months – 10 years | Storage |
| Medium-term | 1 week – 6 months | Imposed floor load, snow |
| Short-term | less than one week | Snow, wind |
| Instantaneous | Wind, accidental load |
Table: Load-duration classes and examples of load-duration assignment (EN 1995-1-1:2004)