In this video, I show the full workflow for optimizing a 15-meter Pratt truss pedestrian bridge using Grasshopper, Karamba3D, the Goat optimizer, and penalization techniques. We start from an initial worst iteration with large displacements and inefficient load paths, then gradually improve the geometry, sections, and support reactions until we reach the optimized design. The workflow includes: -Karamba3D structural analysis setup -Section optimization using OptiCroSec -Global geometry optimization -Displacement and stress control -Reaction force minimization -Goat solver iterations -Comparing worst vs best results -Visualizing deformation, forces, and structural performance If you're learning computational engineering, parametric design, or Grasshopper-based structural workflows, this video will guide you step-by-step through a real optimization pipeline. -------------------- 💡 Tools Used -Rhinoceros 3D -Grasshopper -Karamba3D -Goat Optimization Solver -------------------- ⏱️ Timestamps 00:00 INTRO 00:15 DESIGN SCRIPT OVERVIEW 00:27 TWO-STEP MASS & REACTION MINIMIZATIO 01:05 WORST ITERATION VS BEST ITERATION --------------------