Structures and polymers review lesson

Which of the following does a structure do?

• Protect the contents.

• Support something.

• Contain essential parts.

• None of the above.

What is the difference between a structure and a shell?

• There is no difference.

• A structure is made up of individual parts and a shell is a one piece object.

• A structure is there to protect the contents and a shell is there to provide support.

• None of the above.

What is the difference between a tension and compression?

• There is no difference.

• Tension is where you are trying to twist something and compression is where you are trying to tear it apart.

• Tension is where you are trying to pull something apart and compression is where you are trying to squash something.

• Tension is where you are trying to squash something and compression is where you are trying to pull it apart.

What is torsion?

• Tihis is where the object is being pulled apart.

• This is where the object is squashed.

• This is where the object is bent.

• This is where the object is twisted.

What is the benefit of triangulation on a structure?

• It makes the structure look better.

• It makes the structure much heavier.

• It makes the structure much stronger.

• It makes the structure much cheaper.

Why is stability important in a structure?

• Stable structures are more heavy and cost more money to build.

• Stable structures are not likely to move beyond the limits they were designed for.

• Stable structures look more attractive and attract more buyers.

• Stable structures are more likely to be heavy and use more materials.

What is the difference between a triangle and a square structure?

• Triangles look better whereas squares are not a appealing.

• Triangles are more cost effective to build whereas square structures are not rigid.

• Triangles remain lightweight whereas squares are very heavy.

• Triangles remain strong and rigid whereas squares collapse side to side.

What is the benefit of adding triangulation to your panels?

• They add extra cost.

• They add extra weight.

• They add extra strength.

• They add to the look of the panel.

The weight of load on the structure causes the roof to _ ___ because of a compressive force acting down from both the load and gravity, with the surface below acting upwards and the frame of the structure causing the bending effect.

Gussets are added to the structure to provide added strength to the corners of the frame. The gusset links two sides of the frame together providing more _________ when a load is added to the roof of the structure. The weight of the load can then be more evenly distributed around the whole frame of the structure, this provides added support together with the triangulation design of each of the faces of the structure.