Structures

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  • Teaching suggestion: Discussions could take place about the purpose of different structures other than the ones mentioned. What is the purpose of them? What materials are they manufactured from? How are they fabricated together?
  • You may wish to provide, or ask students for, more descriptions of natural and manufactured structures. The notion that most structures are actually a system can also be explored. For example, a truss bridge is actually a system of smaller truss sections joined together.
  • Other frame structures = table, chair, geodesic dome (Eden project), house frame Other shell structures = phone box, Egg chair, pint glass, squeezy bottle Mass structures could also be considered. For example, structures which rely on the sheer mass of their size to perform their function. An example could be a dam.
  • Alternatively, you may wish to select your own images for students to describe, or ask them to choose a structure in the room they are in, as a plenary exercise.
  • Structures

    1. 1. Structures These icons indicate that detailed teacher’s notes or useful web addresses are available in the Notes Page. For more detailed instructions, see the Getting Started presentation. This icon indicates the slide contains activities created in Flash. These activities are not editable.
    2. 2. <ul><li>Structures are all around us </li></ul><ul><li>They come in all shapes and sizes </li></ul><ul><li>All structures have 3 things in common: </li></ul><ul><ul><li>They must resist forces </li></ul></ul><ul><ul><li>They must not collapse during use </li></ul></ul><ul><ul><li>They must hold parts in right places </li></ul></ul>What are structures?
    3. 3. Contain the essential parts Span a gap Protect the contents Support something What does a structure do?
    4. 4. Categories of structures
    5. 5. Types of structure
    6. 6. Designing strong structures Stability – why things don’t fall over! <ul><li>All structures need to be stable . </li></ul><ul><li>Stable structures are not likely to move beyond the limits they were designed for. </li></ul>Look at the structures below. What makes these structures stable or unstable?
    7. 7. <ul><li>Structures can be made stronger by adding some amounts of material at the right places </li></ul><ul><li>Adding strength to a structure in this way is called reinforcing a structure </li></ul>Reinforcing structures
    8. 8. <ul><li>Brace </li></ul><ul><ul><li>is used to stiffen the framework </li></ul></ul><ul><li>of a structure </li></ul>Reinforcing structures <ul><li>Webs </li></ul><ul><ul><li>- added to a corner to prevent </li></ul></ul><ul><ul><li>the sides to move </li></ul></ul>
    9. 9. <ul><li>Ribs </li></ul><ul><ul><li>added to prevent the structure </li></ul></ul><ul><ul><li>from caving in </li></ul></ul><ul><li>Folds </li></ul><ul><ul><li>by folding the sheet materials </li></ul></ul><ul><ul><li>can make a structure more rigid </li></ul></ul>Reinforcing structures
    10. 10. Describe it Describe each of the structures above. <ul><li>What is it made from? </li></ul><ul><li>How many pieces are there in this structure? </li></ul><ul><li>What is the purpose of each part? </li></ul><ul><li>What methods has the designer used to make it a stable structure? </li></ul>

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