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2007-01-05 08:28:09 · 3 answers · asked by Ha!! 2 in Science & Mathematics ➔ Physics
It is a pretty bridge, but it will not hold much. This is because there is little separation between the top chord and bottom chord in the middle of the span where the bending moment is the maximum.
If you look at truss structures, you will see that the maximum separation of the top chord and bottom chord occurs in the middle. Examine a typical roof truss.
At the very least, provide two bottom chords. These will be in tension so the actual members don't have to be real beefy, but the connections have to hold.
Think about how the structure will fail, and you can imagine the ends spreading apart.
2007-01-05 11:11:07 · answer #1 · answered by daedgewood 4 · 0⤊ 0⤋
That's a pretty impressive looking bridge - you might want to tie the two lower structures together in of couple places.
Otherwise, it looks like a well designed and constructed bridge.
2007-01-05 09:43:24 · answer #2 · answered by LeAnne 7 · 0⤊ 0⤋
add some toy cars
2007-01-05 09:45:14 · answer #3 · answered by fordv 2 · 1⤊ 0⤋