User Guide

RISA-3D User’s Guide
Version 5.0
80
Click OK. Items at the top chord elevation are selected like this:
On the Insert menu select Area Load. Specify “-0.02” for the Magnitude. For
the Distribution Direction select A-B from the drop down list. The case is
already set to Roof Load so click Apply and we will draw the roof load area.
For this 1-way area load the first two clicks define the direction of the load.
Click on the leftmost node (N95) first and then proceed clockwise clicking on the
corner nodes N85, N89 and finally N99 to define the area. Now we have this:
We will select the wind load plane next. Unselect the entire model by clicking on
. Now click the Criteria Selection button. Click the Clear Selection
Criteria button and then in the first X coordinate field enter “26.25” for the
minimum value.