1 / 33

Project 2: Straw Bridge

Project 2: Straw Bridge. Situation: We should across the river safely. Design brief: To design and make a straw bridge model for practicing purpose. Group : 3 or 4 members. Duration: 3 cycles. Project 2: Straw Bridge. Material provided: plastic straws – 40 (200mm long)

Download Presentation

Project 2: Straw Bridge

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Project 2: Straw Bridge Situation: We should across the river safely. Design brief: To design and make a straw bridge model for practicing purpose Group :3 or4members Duration:3 cycles

  2. Project 2: Straw Bridge Material provided:plastic straws – 40 (200mm long) Colourless Self Adhesive Tape Requirement : 1) You are free to design the structure. The product must be made of plastic straw and is fastened by colourless self-adhesive tape.

  3. 100mm >500mm Project 2: Straw Bridge 2) The bridge model should be 100mm wide and over 500mm long. This is a sample only. Don’t copy!

  4. 500mm 175mm 180mm Testing platform Project 2: Straw Bridge

  5. Project 2: Straw Bridge Requirement : 3) Straws parallel overlapping design is not allowed.

  6. Juice Pack Project 2: Straw Bridge Requirement : 4) Weights are placed one by one on the straw structure model until it breaks down so as to test the loading ratio. (Weight: 250ml juice pack, @275g)

  7. Loading Ratio = Maximum Loading Weight of the bridge model Project 2: Straw Bridge Requirement : 5) Weights are placed one by one on the bridge until it breaks down so as to test the loading ratio.

  8. Project 2: Straw Bridge Requirement : 6) The bridge should not consist any component touching the ground of the testing platform and nothing can be used to fix the model on the platform.

  9. Project 2: Straw Bridge • Testing procedures: • Measure the weight of the bridge model by the electronic balance.

  10. 500mm Testing platform Project 2: Straw Bridge Testing procedures: 2) Place the bridge model on the testing platform which is designed for holding a bridge of over 500mm long.

  11. Project 2: Straw Bridge Testing Methods: 3) Place weights one by one on the central of the bridge model until it breaks down. Testing sample

  12. Project 2: Straw Bridge Testing Methods: 3) Place weights one by one on the central of the bridge model until it breaks down. Testing sample

  13. Loading Ratio = Maximum Loading Weight of the bridge model Project 2: Straw Bridge Testing procedures: 4) Count the number of weights used. 5) Calculate the loading ratio. Higher loading ratio is recorded, higher mark will be given.

  14. Sample http://pghbridges.com/basics.htm Project 2: Straw Bridge Information: Search the information about frame, structure and bridge via internet.

  15. Project 2: Straw Bridge Design consideration: Weight of the bridge model Stability Information Solution Bridge structure Special features of straws

  16. Project 2: Straw Bridge Suggested Procedures Design Considerations Initial Ideas Final Idea Solution Make a bridge model (Cycle 2) Testing (Cycle 3) Evaluation (Cycle 3)

  17. Loading Ratio Size Marks < 5 Not fit 0 5 and <10  - - - 1 10 and <15 Fit in 2 15 and <25   - - -  - - - 3 25 and <35   - - - 4 35 and <45   - - -  - - - 5 45 and <55   - - - 6 55 and <65   - - - 7 65   - - - 8 Total 8 + 2 Project 2: Straw Bridge Assessment:

  18. 35 and <45 5 Project 2: Straw Bridge Assessment: e.g. The model’s size fits the testing platform Weight = 25g Loading = 4 x 275g = 1100g Loading ratio = 1100 / 25 = 44 Marks = 2 + 5 = 7

  19. Weights Bridge model Range = 500 mm Project 2: Straw Bridge Information:

  20. Weights Bridge model Range = 500 mm Project 2: Straw Bridge Information:

  21. Weights Bridge model Range = 500 mm Project 2: Straw Bridge Information:

  22. Project 2: Straw Bridge

  23. Project 2: Straw Bridge

  24. Project 2: Straw Bridge

  25. Project 2: Straw Bridge

  26. Project 2: Straw Bridge

  27. Project 2: Straw Bridge

  28. Project 2: Straw Bridge

  29. Project 2: Straw Bridge

  30. Project 2: Straw Bridge

  31. Project 2: Straw Bridge

  32. Project 2: Straw Bridge

  33. Project 2: Straw Bridge

More Related