Definitions
What is a Structure?
Anything made of parts put together for a particular purpose.
What is Torsion?
A twisting force.
What are the three types of structures?
Why do we build with steel for skyscrapers?
Because it is a very strong building material, it can support large weights without bending or breaking.
What is a force?
Any push or pull.
What is a tie?
A support for a beam that attaches on top of a beam and resists tension.
What is Form?
The shape and physical appearance of a structure.
What is a Cantilever?
It is a beam that is supported, or fixed at only one end.
What is a real life example of a Shell?
Concert Hall, Igloo, Egg, Bike Helmet
What does durability mean?
It means a material will be able to withstand things like wear (use), weather or time without breaking down.
What do we measure forces in?
Newtons, named after Sir Issac Newton.
What is a strut?
It is a support that attaches to a beam on the bottom and resists compression
What is Function?
The task or purpose of a structure.
What is a Beam?
Is any reasonably level structure that is designed to support a load.
What is a real life example of a solid?
Bowling ball, statue, book, concrete block.
Concrete! In order for wood to be durable for a long time it must be specially treated to resist warping and rot.
What is magnitude and direction of a force???
Magnitude is how strong the force is... Direction is which way the force is going.
What is a truss?
It is a network of beams arranged in triangles - often in a roof.
The force of attraction between all objects. It is what holds us down on earth!
What is Rebar?
A tennis racquet, a hockey net, a spiderweb, a dock, a chair.
What is flexibilty vs. Rigidity?
Flexibility means something can bend and not break, whereas rigidity means something is stiff and will not bend.
What is the difference between mass and weight?
Mass is how much of an object there is. Weight is gravity acting on that mass.
For example, in Space you have the same mass, but much less weight.
A curved structure used to span a space while supporting a load.
What is Compression?
A crushing, squeezing force.
What is Corrugation?
Mulitiple folds in a material that provide addional strength.
What is an advantage and disadvantage of a Frame?
Advantage - allows space for things such as plumbing, electrical etc.
Disadvantage - Not as strong as a solid
Reducing ________________ improves efficiency when building.
What is the difference between a dead and live load?
A dead load is the weight of the structure itself.
A live load is the weight of objects that go on a structure (people, cars etc.)
What is a dome?
It is a structure that looks like the top half of a sphere or ball.
What is Tension?
A Stretching Force
What is an I beam?
What is an advantage and a disadvantage of a solid structure?
Advantage - Very strong
Disadvantage - Heavy and Expensive
Even the best material isn't practical if it is too __________________.
Expensive.
What is a dynamic load?
A load that is not gravity.
Eg. wind & waves
What are external and internal forces?
Internal forces are from inside the object. eg. the air pressure in a basketball
External forces are from outside the object. eg. Someone throwing a basketball