Why Buildings Don’t Fall: Exploring Structure and Loads - Serena Boudakian – Grade 10 WebQuest

Introduction

Have you ever walked under a bridge or into a tall building and wondered: What keeps it from collapsing under its own weight, the wind, or traffic above?

For high school students like you, this WebQuest will guide you through the basics of how buildings and bridges stand strong. Every structure has a hidden skeleton, called the structure, that carries all the forces (loads) and transfers them safely to the ground. Here, you will explore the main parts of a structure, learn how loads act, and see how architects and engineers design to resist those forces.





Task

By the end of this WebQuest, you will:

  1. Identify the main structural components of a building or a bridge.
  2. Explain different types of loads (forces) acting on these structures.
  3. Sketch and label a simplified structure (building or a small bridge) showing how loads travel.
  4. Reflect on why each structural component is necessary and what might happen if one is weak or missing.
  5. Present your sketch with a short explanation to your classmates, showing where the loads act and how the structure resists them.
Process

Follow these steps, using the sources I provided you with.

 

Step 1 – Explore Structural Components

  • Buildings are made of different parts that work together to carry loads. The foundation holds everything up, the columns and beams form the skeleton, and the roof and walls protect and stabilize.

    • Read “7 Basic Structural Components of a Building” to learn the essential parts of a building’s structure (foundation, walls, beams, columns, bracing, envelope, etc.). Where is the North
  • Engineers think about structures in a systematic way, starting with loads and how they move through a building or bridge.

    • Skim “Structural Design: Chapter 1 – Loads on Structures” to see how structural thinking is introduced. Pressbooks – Structural Design Basics

 

 

Step 2 – Understand Loads (Forces Acting on Structures)

  • Every structure must resist forces, called loads. Some are constant, like the building’s own weight, and some change, like people moving or wind blowing.

    • From the Pressbooks chapter, focus on types of loads: dead load, live load, wind, earthquake (dynamic loads). Pressbooks – Structural Design Basics
  • Visual examples can make loads easier to understand. Some act vertically, others sideways, and some only occasionally.

    • Skim “Types of Structural Load” to see different categories. Designing Buildings

    • Explore “Types of Loads on Structures” for illustrated explanations and breakdowns. GharPedia
  • Seeing loads in action, even in small models, can help you imagine them in real life.

    • Watch “Top Builder: Toothpick Bridge | Design Squad” to see how forces like tension, compression, and bending work in a simple, visual form. YouTube
    • As you watch, think: Where is the “load” coming from? How is the structure resisting it?

       

 

Step 3 – Sketch & Label

  • Put your knowledge into practice by making your own structural diagram.

    • Choose either a simple building (2–3 stories) or a small bridge (beam or truss type) to draw on a piece of A4 paper or on a blank page on a tablet.

    • Label these parts: foundation / footings, columns or supports, beams / girders, floors or deck, bracing / diagonals, a roof or cover (if building).

    • On your sketch, use arrows to show where loads act.
    • Downward arrows on roof, floors → dead + live loads
    • Side arrows on walls, sides → wind, seismic loads

      • Indicate which structural elements carry each load to the ground.

 

 

Step 4 – Answer Guiding Questions & Reflect

Answer the following questions to help you develop and better understand your sketch. (Write your answers on a separate A4 sheet of paper, or on a new page if you are using a tablet.)

  1. What is the difference between dead load and live load? Give one example for each.
  2. How might wind or earthquake loads act on a building or bridge? Which structural parts resist them?
  3. In your sketch: which parts carry loads vertically, and which resist lateral (sideways) forces?
  4. If one part (e.g. beam or bracing) is too weak, what could happen?
  5. Why is the foundation so important?

 

Step 5 – Presentation

  1. Present your sketch to your classmates and teacher.

    • If drawn on paper, scan it using a scanning app or scanner.

    • If drawn on a tablet, save and export the image file.

    • Explain orally in your presentation, according to what you’ve drawn, which loads act on the structure, how they travel through it, and why each structural component is important.
  2. Submit the second sheet with your written answers to the questions above to the teacher.

 

Evaluation

Criteria

 Excellent Good Requires Improvement
Identification & Labels All structural parts correctly labeled Most parts labeled, with minor omissions/errors Several missing or incorrect labels
Load Explanation Clear, accurate descriptions of loads and their action Mostly correct with minor gaps Incomplete or unclear explanations
Sketch & Load Paths Arrows and paths clearly show load travel; loads correspond to structural elements Some ambiguity or missing arrows, but main idea shown Many load paths missing or incorrect
Reflection / Answers Thoughtful, well-explained answers Mostly good with some weak points Many missing or incorrect responses
Presentation / Clarity Visuals are neat and explanation is clear Understandable but could be improved Hard to follow, messy, little explanation

 

Conclusion

Structures like buildings and bridges must resist multiple forces: their own weight (dead loads), people or traffic (live loads), and environmental forces like wind or earthquakes. The skeleton (foundation, beams, columns, bracing) carries these loads safely to the ground. If any part is poorly designed, failure can occur.

Next time you cross a bridge or enter a tall building, imagine the hidden skeleton doing all this work: forces pushing, pulling, trying to break parts, but being resisted by design!



Credits

References used for information and images: 

Teacher Page

Target Audience

  • Grade Level: High School (Grades 10–12)
  • Subject Area: Physics / Engineering Basics / Architecture Introduction

 

Objectives

By the end of this WebQuest, students will:

  1. Identify the main structural components of a building or bridge.
  2. Explain the different types of loads acting on structures (dead, live, wind, seismic).
  3. Apply knowledge by creating and labeling a structural sketch showing how loads travel.
  4. Reflect on the importance of each structural component in maintaining stability and safety.
  5. Present their sketch and explanation to classmates to reinforce understanding and communication skills.

 

Standards / Skills Addressed

  • Critical thinking and problem solving
  • Visual literacy (interpreting diagrams and creating labeled sketches)
  • Application of physics principles (forces, loads, stability)
  • Communication and presentation skills
  • Collaboration and peer learning (discussion and group reflection)

 

Materials Needed

  • Internet access (to view articles and videos)
  • A4 paper or tablets with drawing tools
  • Pencils, pens, rulers (for sketches)
  • Scanner or scanning app (for paper sketches)
  • Projector, screen or board for student presentations

 

Estimated Time Required

  • Total Duration: 2–3 class periods (45–60 minutes each)
    • Day 1: Introduction, Step 1 (Components), Step 2 (Loads)
    • Day 2: Step 3 (Sketch), Step 4 (Guiding Questions)
    • Day 3: Step 5 (Presentations and class reflection)

 

Evaluation Guidelines

Students will be assessed based on:

  • Accuracy and completeness of labeled sketches
  • Clarity of load identification and explanation
  • Quality of written answers to guiding questions
  • Thoughtfulness of reflection
  • Presentation skills (clarity, engagement, accuracy)