Please complete the worksheet handed out in class using the following link:
design and build a bridge made entirely of spaghetti and hot meld glue that spans an 18″ gap.
Weight will be tested as follows:
Remember to weigh your bridge before testing. Each bridge will be loaded by a person from the group that built the bridge. The weight may be applied in increments as decided by the builder group. A minimum 5 second waiting period is required between load applications. The final Official Load is the last load that the bridge withstood for a period of 5 seconds prior to destruction. Timing is provided by a person of your choice. The winner is the legal bridge with the highest Official Load divided by the bridge weight.
To Hand in:
Sketches, bridge results, and calculations (The ratio of maximum load divided by bridge weight) due in PDF format, into MyEdBC by March 2.
Tuesday you will pick a partner/group, work on research and design, and finish your draft sketches.
Thursday we will start building our bridges, and they must be built and cleaned up by the end of double block. Testing will occur on Friday. Please allot 10 minutes for testing. Sketches, bridge results, and calculations due in PDF format, into MyEdBC by March 2.
Please hand in sketches, bridge results, and calculations (The ratio of maximum load divided by bridge weight) due in PDF format, including a short reflection into MyEdBC by March 2. /50
Tips for building:
Tips during loading
Last but not least, HAVE FUN!!!!!!!!
now that we’re done the initial bridge design, bridge construction, and testing, it’s time to do some recap.
Today you’ll be handing in your preliminary ideation sketches, your final bridge sketches (with tension and compression members noted), and a photo or sketch of your ACTUAL bridge (no tension or compression notes necessary).
Next, you’ll include a team reflection under your sketches and photos. This reflection should include:
Please save these as ONE PDF file, with all your team member names on it, and submit on myedbc under the assignment called “newspaper bridge drawings”.
Here are a few photos I took:
now that you’ve used Wednesday’s double block to start ideating, planning, materials testing, prototyping, etc…. you should be ready to come up with your sketch, build plan, and test your design using West Point Bridge designer.
Download here: https://sourceforge.net/projects/wpbdc/
You should be able to download and install without any special permission necessary.
Once the software is installed, check it out. Open a sample Warren truss bridge, then open a new project and try placing nodes, and click & drag to place members, then test your bridge! Remember, you only need to draw one side of your design. This software can’t test triangular prisms, only rectangular prism trusses. Try changing the gap distance and see if your bridge design holds up!
You can also check out jfmatrix to test your design (although this software is more difficult to use): http://www.jfmatrix.com
Once you’re done your draft, have a building plan, have brought newspaper to school, and have tested your bridge using the west point bridge software…then you can play cargo bridge:
cargo bridge: http://www.engineering.com/GamesPuzzles/CargoBridge.aspx
Here’s a recap of the project expectations, we will be building and testing on Wednesday February 19. Come to class prepared!
Materials for building:
Build time: Wednesday Feb 19 double block, in the garage
Due: Wednesday end of double block
Things to consider:
Some tips given in class….
1.An easy way to switch from absolute to relative coordinate entry is by turning on and off the dynamic input button located at the bottom of your screen:
2.A quick way to check and see if your assignment is in inches or mm is to type “limits”. The lower left corner should display as <0,0>, and the upper right should be something like <12,9> or similar if Inches, and <280,216> or similar if Millimeters.
3. In order to set up Autocad to ask you if you want to open a metric or imperial file when you start a new drawing you type “startup”, then change the startup value to <1>. Once this is done, when you click the “new” button you should get this option:
4. Some helpful commands to try for the first few assignments:
5. Object snap and lineweight are your friend, and the buttons are located on the bottom toolbar.
Hey students, here’s your challenge for this afternoon. Please select a problem from the word cloud. Then, you need to go through the problem statement process, filling out all 4 criteria, then you can start brainstorming possible solutions. You can do this on paper, or word….. or however you’d like. Please post your problem statement in the comments.
the problem of: FH students j-walking to timmies
affects: students, motorists,
the impact of which is: students in danger of being run over, motorists losing control in order to try to avoid collision, etc etc
a successful solution would: allow students to cross safely, ensuring the safety of all students and motorists.
****I am going to be super critical of your problem statement, NOT your solution……*****
Please, in partners, comment 5 things that you would identify as problems that need to be solved. Write your names in with your comment.
JR drafting booklet
SR drafting booklet
What Do Hand-Washing and Financial Illiteracy Have in Common? (Ep. 58)
Due January 29 by 8:20am
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