What strength level (yield strength) do you think a bridge plate in a long
suspension bridge should have?
Less than 150 MPa - Incorrect, not only is it virtually impossible to make a commercial steel with
such a low strength level but any bridge made using a steel of this strength
would not be able to take any substantial loading. Try again. |
|
150 - 250 MPa - Incorrect, this strength level is too low for any bridge plate application,
certainly not appropriate for a long suspension bridge. Try again. |
|
250 - 350 MPa - Incorrect, this strength range incorporates some structural steel grades,
however for this application a higher strength is required. Try again. |
350 - 500 MPa - Correct, for this type of application a yield strength of about 400MPa is
required. |
|
500 - 700 MPa - Incorrect, it is possible to use structural steels of this strength range
however it is a little high for the application we are considering. Try again. |
|
Greater than 700 MPa - Incorrect, this strength level is too high for our application. Try
again. |
|
Click on your answer to check and make a note of the answer on your notepad. |
NOTEPAD
The 3 most important properties for plate steel for structural applications:
Strength
Toughness
Weldability
Typical yield strength level for a bridge plate in a
long suspension bridge is:
350 - 500 MPa (more accurately 400 MPa)
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