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The Frame3D library is a complete analysis library for solving structural problems utilizing a powerful and robust analysis engine, which in combination with the reach analysis and element features can efficiently solve large scale static, dynamic, linear and non-linear problems. It has been developed from scratch by ENGISSOL’s Research & Development Department using the reliable and accurate platform Microsoft .NET and following the principle of object-based programming, a fact that ensures flexibility, easy communication and integration to other programs and inspectional interaction with it. ANALYSIS FEATURES: Linear Static analysis Modal analysis Response Spectrum analysis combining dynamic modes using Square Root Summer Sum (SRSS) or Complete Quadratic Combination (CQC) rules Linear Time History analysis Geometric Non Linear analysis (second order effects including both P-Δ and P-δ effect, using many stiffness updating algorithms)