Grade 7 · Form, Function, and Design of Structures · Form, Function, and Structural Design
Design a Stable Community Shelter
A successful structure must perform its function safely for its users and environment. Its form, centre of gravity, materials, symmetry, joints, and maintenance all affect performance.
Visual model
See how the ideas connect
For students
Notice, predict, explain
Choose one part of the model. Predict how it connects to another part, then use the lesson evidence to explain your thinking.
For teachers
Pause for science talk
Show the model before the explanation. Ask “What do you notice?” and “What might change?” Then revisit student ideas after the worked example.
The big idea
Structural design balances connected requirements
There is rarely one best design. Engineers evaluate forces, stability, failure risks, accessibility, comfort, cost, environmental effects, and community priorities together.
Work it through
Evaluate a small storm shelter
- Step 1 Choose a frame, shell, solid, or combined form that creates usable space and transfers expected loads.
- Step 2 Keep the centre of gravity low and the base appropriately wide to improve stability against tipping.
- Step 3 Map each force's magnitude, direction, point, and plane of application, then strengthen likely failure points.
- Step 4 Compare materials and layout using strength, durability, local availability, environmental impact, accessibility, and maintenance needs.