Bridges Name: Assessment: Communicating ideas, making & evaluating

Contents Page: Situation/Design brief Specifications Research (natural structures) Research (man made structures) Research (forces) Research (bridge design) Generating and developing ideas Making Evaluation Evaluation and testing

Situation and Design Brief Situation: The government of Jakarta has asked a local construction company to build a bridge than will span a small river in East Java. This bridge will need to support cars, lorries and pedestrians and it will shorten the traveling time between the two villages on opposite sides of the river. They have commissioned 5 teams of engineers to design a scale model that will then be made full size. These teams will be competing for the contract and the strongest design will win the design contract. Design Brief Working in teams of 4 or 5, design and make a model bridge using only: Balsa wood 3mm x 3mm (square section) 60cm lengths Wooden skewers (x 50 per group) Balsa Wood for decking (90cm x 8cm x 2mm) x 2 Celloptape String The bridge should be no more than 10cm wide, 50 cm long and 60cm high. Some parts of the bridge can hang below the road surface level, but cannot be fixed to the sides You do not have to use all of the material provided. The winning design will be the strongest bridge. Note : There is no restriction on your actual design, but it should incorporate the best features of truss/beam, suspension, arched and cantilever bridges that you have researched.

Specifications Your bridge should : be as strong as possible be as light as possible be as rigid as possible be no more than 10cm wide be no more than 60 cm long be no more than 70cm high incorporate drinking straws in some part of the construction be based on your own original design (decided as a team) be finished to a high quality

Research: Natural structures In the space below, paste some images of FOUR natural structures.

Research: Man-made structures In the space below, paste some images of FOUR man made structures.

Forces In the space below, use simple diagrams to explain the difference between the following types of force. CompressionBending TorsionTension

Research: Bridges On the next two pages, paste some images of bridges that you particularly like, that you have used for inspiration for your own design. If possible identify the name of the bridge and its location.

Research: Bridges

Design Ideas In the space below, paste some simple sketches or CAD drawings that you used when planning your bridge design. These can be part or complete drawings that identify particular features that you want your bridge to have.

Make On the next two pages, paste some photographs that illustrate the stages that you went through as you were making your model bridge. Alongside each image, explain what was taking place.

Make

Research: Evaluation In the space below describe how you made your bridge and what roles people had in your group In a space below, explain the benefits of working on a team project

Research: Evaluation & Testing In the space below describe how your bridge performed under load (use photographs where necessary)

Research: Evaluation & Testing In the space below, describe three modifications that you could make to your bridge to increase its strength (use photographs, illustrations or sketches where necessary).