Building Mini Infrastructure

Overview

This is lesson 24 of 30 in Infrastructure Skills Development. Students work in groups to design and plan a small infrastructure project, applying their understanding of structural frameworks, forces, materials, safety, stakeholders and project planning. The lesson moves from an identified need to a feasible conceptual design and an organised plan for development.

Learning intentions

• WALT identify an infrastructure need, its stakeholders and the context in which it exists.
• WALT apply structural framework concepts to a proposed infrastructure outcome.
• WALT select planning tools to manage the development of an outcome.
• WALT use evidence and group feedback to refine a conceptual design.

Success criteria

• I can describe the need my project addresses and identify relevant stakeholders.
• I can explain how loads, forces, members and joints influence my design.
• I can communicate a workable conceptual design with materials, dimensions and safety considerations.
• I can create a realistic plan showing goals, resources, responsibilities and review points.

Curriculum links

• Develop a conceptual design for an outcome: generating, evaluating and communicating a design informed by research, functional modelling and stakeholder feedback.
• Select and use planning tools to manage the development of an outcome: setting achievable goals, identifying resources and establishing critical review points.
• Demonstrate understanding of advanced concepts related to structural frameworks: members, joints, loads, forces, profiles and safety factors.
• Undertake brief development to address an issue: identifying a need, stakeholders, context, outcome and specifications.

Lesson structure (120 minutes)

1. 0–10 min · Hook and retrieval. Teacher opens the infrastructure challenge deck with a striking image of a temporary footbridge under load and asks, “What could make this structure fail?” Students individually list remembered concepts about tension, compression, shear, fixed and moving joints, then compare answers with a partner.

2. 10–25 min · Project brief and success criteria. Teacher explains that groups will plan a small infrastructure project such as a pedestrian bridge, shelter, bike stand, viewing platform, emergency structure or storage facility. Using the infrastructure challenge deck, the teacher models how to move from an issue to a brief, including purpose, users, site, constraints and required attributes. Students form five groups of five, choose or receive a project context, and record the issue, need, stakeholders and proposed outcome on the mini infrastructure project planner.

3. 25–43 min · Technical design input. Teacher revises how static point loads are transferred through framework members and models a simple structure using force arrows, identifying likely tension, compression, shear and torsion. The teacher also demonstrates how profile, form, joint type, tolerance, material choice and safety factors affect integrity. Students annotate a sample framework in the mini infrastructure project planner and identify two likely failure points for their own project.

4. 43–70 min · Generate and evaluate concepts. Teacher sets the design task: each group must produce at least three possible concepts before selecting one. Students sketch, label and compare alternatives, considering function, appearance, site, accessibility, sustainability, materials, construction methods and social acceptability. Each group uses a quick decision matrix on the mini infrastructure project planner to score concepts against agreed criteria and records reasons for its selection.

5. 70–78 min · Critical review checkpoint. Teacher pauses the class and asks groups to test their chosen concept against three questions shown in the infrastructure challenge deck: “Will it carry the expected load?”, “Can it be made with available resources?”, and “Is it safe and suitable for its users?” Groups conduct a structured peer review with another group, receiving one strength, one technical concern and one suggested improvement. They revise or confirm their design and document the decision.

6. 78–108 min · Develop the project plan. Teacher models a concise plan of action and Gantt-style timeline, including goals, tasks, sequencing, people responsible, time, materials, tools, specialist knowledge and review points. Students complete the planning section of the mini infrastructure project planner, producing a labelled conceptual design, materials and equipment list, safety controls, task sequence, group responsibilities, timeline and at least two critical review points. Each group must include a contingency for one likely problem, such as material shortage, unstable joints or insufficient time.

7. 108–120 min · Present, assess and exit. Each group gives a two-minute design pitch supported by its sketch and plan. The audience records one question about technical feasibility and one question about stakeholder needs. Teacher uses the infrastructure challenge deck for the final reflection prompts, then students complete the individual exit question on the worksheet: “What is the most important design or planning decision your group made, and what evidence supports it?”

Resources

• the infrastructure challenge deck
• the mini infrastructure project planner
• Structural framework photographs or exemplar project images
• Grid paper, A3 paper, pencils, rulers and coloured pens
• Calculators and sticky notes
• Lightweight modelling materials, if available
• Whiteboard or shared digital workspace
• Access to relevant classroom tools and material samples
• Projector and timer

Assessment

• During retrieval and technical input, question students about force types, member roles, joints and safety factors; address misconceptions before design work begins.
• Check each group’s issue, stakeholders, specifications, force analysis, concept comparison and planning tools at the critical review checkpoint. Look for evidence-based decisions rather than attractive sketches alone.
• Collect the individual exit responses and the completed group planners. Use them to identify students needing support with structural reasoning, planning or justification before the next lesson.

Differentiation

• Provide a word bank, annotated framework example, force-arrow prompts and sentence starters such as “The load is transferred through…” and “This material is suitable because…”.
• Allocate group roles such as project manager, structural analyst, materials researcher, design communicator and safety manager; rotate roles where practical so all students contribute.
• Support students with literacy or processing needs through chunked worksheet sections, visual exemplars, oral rehearsal and the option to use speech-to-text or a digital drawing tool.
• Extend confident students by requiring a basic safety-factor justification, a comparison of two member profiles, a more detailed load path or a contingency plan supported by quantitative estimates.