The goals in coming up with this design for the bridge are
to build a bridge that can hold the greatest amount of weight, but cost the
least. This influenced the design of the bridge by the uses of smaller bars.
Smaller bars are cheaper and have a smaller chance of bending under strenuous
weight. This bridge’s longest bar is 5 inches long.
ELEVATION
1st LEVEL PLAN
2nd LEVEL PLAN
During the design of the bridge it changed in many aspects.
Initially the idea was to use as few bars and gusset plates as possible,
because having few parts could be cheaper. The design then changed at the
realization that having multiple smaller pieces were both stronger and more
cost efficient than having fewer, longer pieces. This changed the design
because I used this information to make my bridge better. A few of the longer
bars were switched out for smaller bars and extra gusset plates. This bridge when build would be a little over 2 ft long. and about 7 inches tall.
From
this bridge design I learned that there is more that one way to build a strong
cheap bridge. It depends on the approach that is taken when designing the
bridge. In class I noticed some people try to use the longer bars with the
shorter bars to make the trusses. I learned as well that there is a fine line
until the bridge will collapse.
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