The following example shows how to estimate the rotational stiffness of a trapezoidal sheeting connected to the top flange of a purlin (CD,A) as per EN1993-1-3.
Note: Position of sheeting positive / negative
bT: Width of the sheeting flange through which it is fastened to the purlin (in mm)
bT,max: See Table 10.3
In Advanced Design, the rotational stiffness from sheeting to purlin can be considered when the Advanced Stability feature is enabled:
The CD,A rotational stiffness can then be specified in the bedding tab, as the KRx component: