Truss sections are used to define the section properties of slender, rod-like structures in two and three dimensions that provide axial strength but no bending stiffness. For more information, see “Truss elements,” Section 29.2.1 of the Abaqus Analysis User's Guide.
To specify truss section properties:
From the main menu bar, select Section
Create.
A Create Section dialog box appears.
Tip:
You can also click Create in the Section Manager or select the create section tool 
in the Property module toolbox.
Enter a section name. For more information on naming objects, see “Using basic dialog box components,” Section 3.2.1.
Select Beam as the section Category and Truss as the section Type, and click Continue.
The truss section editor appears.
Select a material for the truss section. If desired, click 
to create a material; see “Creating or editing a material,” Section 12.7.1, for more information.
Enter a value for the Cross-sectional area.
Click OK to save your changes and to close the truss section editor.