1
Q
Pratt truss
A
Right triangles Slants face center of bridge
2
Q
Howe truss
A
Right triangles Slants face away from center of bridge (Blue=compression red=tension)
3
Q
In what areas is it better to use stronger or thicker wood?
A
Areas of greater stress
4
Q
Main principle
A
Must be lightweight
5
Q
Compression
A
Pushing together Denser wood needed
6
Q
Tension
A
Pulling apart Flexible wood needed
7
Q
Balsa wood
A
Light cheap weak inconsistent density
8
Q
Bass wood
A
Stronger constant density bends more heavier more expensive areas of compression/tension
9
Q
Warren truss
A
Equilateral triangles Every diagonal is subject to the same load, every other line alternating between compression and tension
Science Olympiads
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