Changes can be made however, the goal is for the groups to have a plan in mind prior to building. Each bridge must have a deck on which the load can be placed during the challenge. After exploration students should work as a team to draw the design that they will build in response to the challenge. They can also examine photographs of bridges to see how geometric shapes are incorporated into the design before testing the ways that they can make and connect shapes with their materials. Prior to the building challenges, student teams should be given time to explore and experiment with the materials that they will be using. The challenge is to build something strong enough to allow people, animals, vehicles or sometimes just water to cross safely. From Engineering Bridges, by Pendred Noyce: A bridge is a structure that spans a gap, usually over a river, a harbor, a canyon or a highway.Historically, people used resources that were available in their environment to find the materials such as wood, stones, vines or rope that they used to build bridges.The class should be introduced to the importance of bridges to people around the world and the changes in bridge design over time. Vocabulary adapted from Noyce, Pendred E, Engineering Bridges Connecting the World, Boston: Tumblehome, Inc., 2019. Span: The part of the bridge deck between supports.Load: The forces that a bridge must resist, including the weight of the bridge and anything on it.Deck: A bridge’s roadway or surface that allows traffic to cross.Students should be reminded not to eat any of the bridge building components, if edible materials are used. To simulate the constraints faced by engineers, who do not work with an unlimited supply of materials, the students should be given a budgeted amount of each item. Other supplies that can be available include: scissors, meter stick Some popular materials for bridge building challenges are: Optional Design Challenge: prior to testing, the students can discuss and vote on the visual appeal of the bridgeīe creative – choose supplies that are available to you.This can also be varied to include a competition to determine which bridge design can hold the greatest load.
Load Challenge: at a minimum, the bridge must be able to hold – pennies.
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