Toothpick Bridge Truss Load Challenge (ENG04) | Civil Engineering

🌉 Toothpick Bridge Truss Load Challenge (ENG04) Explore structural mechanics, load distribution, tension vs. compression, and micro-truss efficiency! The Toothpick Bridge Truss Load Challenge (ENG04) challenges middle school student teams to act as civil engineers, designing a lightweight, high-strength toothpick truss bridge to span a 20 cm gap and carry maximum load weight. Students explore tension, compression, structural geometry (triangles vs. rectangles), Howe/Pratt/Warren truss patterns, joint gusset mechanics, and structural efficiency math! 📦 What is Included in This 3-Page Packet: Page 1: Teacher Guide & Lesson Plan: NGSS alignment (MS-ETS1-1, MS-ETS1-2, MS-PS2-2), target science concepts, and span setup guide. Expected student outcomes, answer keys, and load bucket testing safety tips. Perfect for your TGM Product Preview! Page 2: Student Mission Card & Blueprint: Real-world civil engineering and micro-structural infrastructure scenario hook. Clear material limits box (150 toothpicks, glue, wax paper, metric ruler, digital balance). Dedicated Toothpick Truss Geometry & Vector Schematic sketching zone. Page 3: Testing Log & Scientific Reflection: Structured Data Testing Table: Track unloaded bridge mass (g), maximum load held at failure (g/kg), and structural failure modes. Applied Math Connection: Calculate Structural Efficiency Ratios (Load Mass / Bridge Mass). Physics Reflection Questions: Analyze triangle stability, joint gusset mechanics, and structural failure point reinforcements. 📐 Core STEM Skills Covered: Civil & Structural Engineering, Highway Bridge Mechanics Tension and Compression Vector Analysis, Micro-Truss Rigidity Data Logging, Precision Mass Measurement (g/kg), and Ratio Calculations Failure Mode Analysis and Structural Efficiency Optimization 💡 Why Teachers Love This Resource: 3-Page Professional Layout: Includes a complete Teacher Guide for seamless prep, keeping student lab sheets clean and ready to print! Low-Cost Materials: Uses simple toothpicks, craft glue, wax paper, a bucket, and testing weights/washers. High-Impact Physics Lab: Turns micro-structural engineering equations into a high-stakes, competitive, and measurable destruction test! Format: High-resolution, print-ready PDF format (3 Pages).