Geometry
Add another calculation model to the active project, using the icon 
in the toolbar. In the new window that appears you can now draw the axes of the truss that you want to dimension, or alternatively you can use Wizard for the rapid definition of standard type structures. For this, use the icon 
from the field Geometry.
Now select the type of structure ‘Portal frame’ in the dialogue that appears and confirm with ‘Start wizard‘:
In the dialogue that appears you can change the geometry of the truss quickly on the basis of a limited number of parameters. Accept the default settings for geometry and boundary conditions.
Note that in this dialogue, you can navigate with the buttons < Previous and Next > .
To confirm the definition, click on ‘Finish‘.
You’ll end up with the following definition of the frame:
Loads
Select the end of the truss girders and click on the icon 
. Enter the following load data:
The selection 
implies that the entered loads will be projected on the beam. Their value will be recalculated as a function of the angle the beam.
Click OK and the following loads will be shown on the beams:
Note that a wrong operation can be made undone using the instruction menu ‘Edit > Undo …‘ or by pressing the keys CTRL + Z.
Besides the classic options for defining point loads and distributed loads, 1•2•Build provides also wind and snow generators. To use the wind generator, select wind1, wind2, wind3 or wind4 first from the list of possible loads:
Wind1 and wind2 may be used for a wind load from left to right and with and upward respectively downward direction. Wind3 and wind4 can be analogues used to define wind from right to left.
When 1•2•Build combines the loads, it will be automatically taken into account that wind loads can never occur together. The same remark applies also for snow1 and snow 2 when you’re using the snow load generator.
Now select the entire frame and click 
:
Opt for example for an upward wind load from left to right and define the total length of the structure perpendicular to the wind direction. You should also define the distance between the frames (take 5m). This way 1•2•Build knows how many area will be supported by the frame.
