Observations and notes made from three bridges created in week 2
1. SATE STICKS
Construction
process:
Through
group brainstorming, we came up with an idea that mimicked weaving and
stacking. On the base layer five single sate sticks were laid out at equal
distances. On top of those, five more single sate sticks were laid across
evenly, but rotated 90 degrees to create a hatching pattern. The sate sticks
were then staked on further, using hot glue as a means of connection. The final
structure ended up approximately 2.5cm in height.
Observations:
With
only using the force of our hands pushing down on to the structure, it seemed
already quite strong. Once all the trays of paper were placed on top, two
people stood on top of it. The structure did not break after the paper weight
or the two human loads.
Weight
of structure:
67g
Weight
at breaking point/load collapse:
Approximately
157kg
Weight
of supported load/weight of structure:
157000.00g
/ 67.00g = 2343.28g
2. SATE STICKS AND NYLON
Construction
process:
Without
the aid of hot glue as a way to connect the sate sticks together, nylon and
rubber bands were used. These created pin joints in the structure which would
make it unstable if forces were to be placed on it upright. However since the
load would be vertical and the structure flat, the pin joints were not so much
of a concern. Nine sate sticks were grouped together to create more strength
and to reach the height of approximately 2cm.
Observations:
Similar
to the Sate Stick Bridge, the bridge by itself already seemed structurally
sound. This was confirmed when paper weight was loaded on to the tray and a
human load was able to bounce/jump up and down on the bridge without it falling
into itself or breaking.
Weight
of structure:
75g
Weight
at breaking point:
Approximately
90kg
Weight
of supported load/weight of structure:
90000.00g
/ 75.00g = 1200.00g
Construction
process:
Similar
to the paper bridge in week one, this bridge would follow the same accordion
like folds to create strength and have more surface area to the structure.
Since the bridge only had to be a minimum of 2cm high, the original 5cm high
construction paper was folded in half to make a resulting 2.5cm high bridge,
and also to create more density and stability in the bridge as a whole
Observations:
Once all
the paper weights were placed on top of the structure, three people were able
to stand on top of it before it gave way on the corner of the bridge. This
could be due to a lack of density and strength in that area of the structure,
or simply the person standing on that corner was heavier than the rest causing
it to collapse.
Weight
of structure:
51g
Weight
at breaking point:
Approximately 197.5kg
Weight
of supported load/weight of structure:
197500.00g
/ 51.00g = 3872.55g
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