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EngiLab Truss.2D is a powerful structural engineering software for the linear static analysis of plane (2D) trusses for Windows. The program features a fast, rich and intuitive user interface for pre-processing and post-processing of the results. It uses the Finite Element Method (FEM) for the analysis, with 2 DOFs per Node (DX, DY). The program supports all major unit systems (Metric, Imperial US, Consistent), while the user can define custom units for any quantity. It supports Nodal Loads, Uniform Loads on members and body (acceleration) inertial loads (e.g. self weight). All distributed loads are handled as equivalent Nodal Loads applied on the joints of the model. It supports any type of constraints and springs. There is also a built-in Section Properties Calculator for most standard sections. DXF drawing files can be imported as Models. The program calculates and reports the Node Displacements (DX, DY, DTotal), Support Reactions (FX, FY, FTotal), Element Results (Force, Stress, Strain, Elongation, Strain Energy). Basic code checks are also performed against Yielding (Stress) and Buckling. The stress check is done for all members, while the buckling check is done for compressive members. All analysis results can be exported as a report to a document (in RTF format) for easy processing with a word processor. The program can draw the Model Deformation, Free Body Diagram, Axial Force/Stress/Strain Diagrams and Color Plots, where each member is colored according to the value of its Force, Stress or Strain. Red color is used for Tension and blue for compression, by default. All drawings support automatic scaling for optimal viewing. Other than the analysis, EngiLab Truss.2D validates its results using principles of mechanics. It checks the Global Equilibrium, Energy Conservation, Joints Equilibrium and Elements Equilibrium. The validation procedure verifies that the analysis results are correct. The validation results are presented to the user in tables.