Wooden Bridges Testing Various Designs to the Limits

The task was to design a bridge so that it can be used over a 60 cm gap with the best ratio of How much it can hold/Weight of the bridge. The max length could be 75 cm. It took us about 8 hours overall, 4 people and some blisters from the glue gun to do these bridges. Sorry for the Quality of the video as it was recorded on my phone.