Final Bridge
After designing, testing, and analyzing the three-foot
bridge in numerous ways, the design was ready to be finalized. The final design
for the bridge consisted of twenty
two
main squares and each one has an “X” cross through it. Eight squares on the left side of the
bridge, eight on the right of the bridge, and six on the top of the bridge. The
elevation view and plan view of the bridge could be seen in the figure. There
is an angle tilt on the two sides of the bridge which means the bottom part is
longer than the top part of the bridge. The bottom part of the bridge is
composed by nine 3.375” chords and the top part of the bridge is composed by
seven 3.375” chords. One 360 °guest plate and four
1.25” cords consists the “X”
cross in the square. For satisfied the constraint that leaving enough room for
the vehicles to travel across, the height of the bridge is given by the length
of 360°guest plate and two 1.25” cords and the width of the
bridge is given by 5” long chord. These 5” chords could also prevent the
twisting of the bridge.
The design used a
lot of 360°gusset plates and 180°gusset
grooved plates. The 360°gusset plates help to extend the length
of the bridge and joints to consist triangle of the bridge. The 180°gusset grooved plates greatly increases the possible combinations of
the chords in three dimensions. But the fault of the 180°gusset grooved plates is obvious that the cost would apparently
increase.
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