ETABS is available in two levels: Plus (P) and Nonlinear (N). A letter in parenthesis following a feature identifies the version(s) that are associated with it. MODELING (N, P) • Object Based Graphical Interface • Model Templates for Most Steel & Concrete Building Systems • Models Created Using Building Terminology • Beam/Column/Brace Frame Objects • Wall/Slab/Deck Shell Objects with Internal Meshing • Story Definitions using the Concept of Similar Stories • Common Labeling of Objects between Similar Stories • Editing with Move, Merge, Mirror and Replicate • Accurate Dimensioning with Guidelines and Snapping • Rigid, Semi-Rigid and Flexible Floor Diaphragm Definitions • Powerful Extrusion Command for Generating Ramps • Auto Line Constraints for Mismatched Wall Meshes • Quick Draw Options for Object Creation • Draw Command for Easily Adding Openings to Floors • Support for Multiple Coordinate Systems • Powerful Grouping and Selection Options • Automatic Generation of Code Lateral Wind and Seismic Loads • Transfer of Loads from Decks/Slabs to Beams and Walls ANALYSIS • Static and Dynamic Analysis for Frame/Shear Wall Buildings (N, P) • Response Spectrum Analysis with Eigen or Ritz Vectors (N, P) • P-Delta Analysis (N, P) • Automated Center of Rigidity Calculations (N, P) • Gravity, Pressure and Thermal Loading (N, P) • Frame Objects Drawn as Physical Members (N, P) • Automatic Meshing of Decks/Slabs for Diaphragm Analysis (N, P) • Wall/Slab/Deck Modeled as Shell, Plate or Membrane Type (N, P) • Seismic Acceleration or Displacement Time History Analysis (N, P) • Wind Load Forcing Functions (N, P) • Explicit Panel-Zone Deformations (N, P) • Construction Sequence Loading Analysis (N) • Frame Hinges for Axial, Flexural, Shear & Torsional Behavior (N) • Nonlinear Static Pushover Analysis (N) • Viscous Dampers (N) • Base Isolators (N) • Gap Object for Structural Pounding (N) • Nonlinear Time History Analysis with the Wilson FNA Method (N) • Large Displacement Analysis (N) DISPLAY • 3D Perspective Graphical Displays (N, P) • Static Deformed and Mode Shapes (N, P) • Loading Diagrams (N, P) • Animation of Deformed Shapes (N, P) • Force Diagrams and Stress Contours (N, P) • Integrated Force Diagrams for Wall Piers and Spandrels (N, P) • Selective Results Displayed On-Screen with Right-Button Click (N, P) • Tabular Display of Model Input & Output (N, P) • Graphical Section Cut Definitions for Forces and Stresses (N, P) • OpenGL Viewer (N, P) • Display of Displacement and Force Time History Records (N, P) • Time History AVI Files (N, P) • Response Spectrum Curves from Time History Analysis (N, P) • Nonlinear Force-Deformation Plots (N) • Graphical Display of Nonlinear Hinge Status (N) DESIGN (N, P) • Steel Frame Design for Numerous Domestic & International Codes • Concrete Frame Design for Many Domestic & International Codes • Composite Beam Design for American, British & Canadian Codes • Concrete Shear Wall Design for American, British & Canadian Codes • Design for Static and Dynamic Loads • Member Selection and Optimization • Automatic Tributary-Area Live Load Reduction • Graphical Section Designer for Complex and Built-Up Shapes