Module 3: Materials and Structure
A robot frame has one job: hold every mechanism in the right place while absorbing impacts from other robots. This module covers the materials FTC teams actually use and the structural ideas that keep a frame from flexing.
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Lesson Roadmap
3.1 · Material SelectionLesson 3.1: Selecting Materials for FTC StructuresOpen3.2 · Build SystemsLesson 3.2: Working Inside goBILDA, REV, and Tetrix Build SystemsOpen3.3 · StiffnessLesson 3.3: Stiffness, Deflection, and Why Beam Depth WinsOpen3.4 · Weight BudgetLesson 3.4: Holding the Robot to a Weight BudgetOpenModule 3 · Mastery QuizModule 3 Mastery Quiz: Materials and StructureOpen
What This Unit Covers
Compare aluminum, steel, polycarbonate, and printed plastics by stiffness, weight, and workability.
Work inside a commercial build system without fighting its hole pattern.
Explain why a deep beam resists bending far better than a thick one, and use triangulation deliberately.
Hold the robot to a weight budget by tracking subsystem mass as you design.
Review the sequence and goals here, then resume at your first incomplete lesson.
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