PIEHWCADToolPractice

1. Print out the full scale elevation drawings of the file folder bridge (right click on this link and "save as" onto your computer). When you print the pdf file (using the free Adobe Acrobat Reader), make sure that the drawing is printed out 100% of the original size (make sure the "scale factor" box in the Adobe Acrobat print menu is not checked). You can verify that your printout is true-to-scale by measuring the center-to-center distance between two vertical posts (exactly 10 cm). Then carefully cut and tape the pages together into a full size drawing. Write your name on it, roll it up, put it into a tube if you have one, and bring it into class.

Here is another CAD tool for you to use: Trussmaster by Colin Caprani web page -- Look for the TrussMaster program (2nd one listed). Download the zip file, run the setup.exe file to install.

If you have Autocad and a plotter, you can download the autocad files here.

2. Use the truss analysis CAD tool to find the internal and external forces acting on the file folder bridge above. conceptually it is best to load a single truss with a unitary force of force to see what fraction of that unit force translates to the various members. Use whatever loading force you want (use the same loading pattern that you will see in the competition). Cut and paste the CAD output into word and print it out, then convert the resulting numbers to a unitary scale (pencil in those answers on your printout). Your word document should include your name and the date and this task description.

3. Use the truss analysis CAD tool to find the internal and external forces acting on the "crane" trusses from your last quiz and test from quarter 1. Cut and paste the CAD outputs into word and print it out, then scale your load to match the load on the quiz, then pencil in scaled values for the rest of the internal/external forces. Your word document should include your name and the date and this task description.