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2 Input Data<br />
Material <strong>Pro</strong>perties<br />
The partial safety factor γ M represents the safety factor used to calculate the design values<br />
of the material stiffnesses. By means of this factor the program reduces the characteristic<br />
strength value for bending f m,k , tension parallel f t,0,k , tension perpendicular f t,90,k , compression<br />
parallel f c,0,k , compression perpendicular f c,90,k as well as for shear and torsion f v,k according<br />
to Equation 2.1.<br />
The factor γ M , as described for example in EN 1995-1-1, eq. (2.14), must be taken into account<br />
for the ultimate limit state design.<br />
X<br />
d<br />
= k<br />
mod<br />
X<br />
⋅<br />
γ<br />
k<br />
M<br />
Equation 2.1: Reduction of characteristic strength by modification and partial safety factors<br />
The partial safety factor can be adjusted in the Settings dialog box, tab General (see Figure<br />
2.5, page 13).<br />
Material Library<br />
Numerous materials are available in the library. To open the library,<br />
select Material Library on the Edit menu<br />
or use the button shown on the left.<br />
Figure 2.9: Dialog box Material Library<br />
In the Filter Choice section, Timber is preset as material category. Select the timber grade<br />
that you want to use for the design in the list Material to Select. The corresponding properties<br />
can be checked in the dialog section below.<br />
Click [OK] or use the [↵] button to import the selected material to table 1.2 of <strong>RF</strong>-<strong>TIMBER</strong><br />
<strong>Pro</strong>.<br />
16<br />
<strong>Pro</strong>gram <strong>RF</strong>-<strong>TIMBER</strong> <strong>Pro</strong> © 2011 Ing. <strong>Software</strong> <strong>Dlubal</strong>