Bridges v.2

Goal: Build a bridge(s) that allows for a balance of community needs

Role: You are a bridge(s) designer tasked with building a bridge to join 2 communities together

Audience: Communities on either side of the river

Situation: Both communities on each side of the river want a bridge(s) built.
Performance: Students will build popsicle bridge(s) that balances the needs for each community.

You will design a way to join 2 communities together via a bridge.

Performance Task (What you need to do)

Step 1: Decide what kind of bridge you are going to build. Use the worksheet that is in GCR.

Solve for the problems listed in the far right column of the worksheet.

Bridge drawing must have the following:
- Top and side view
- Clear and detailed link to writing
- Problems from table are drawn with care and intent- not just slapped on/half done.
- Must have solutions for the problems labeled on the technical drawing itself.

Develops accurate planning drawings/diagrams. EVERYTHING is labeled accurately, Drawings are highly accurate. The level of precision and care is obvious.

Your paper bridge (above) is to help you understand human/bridge interaction. You will do a SEPARATE technical drawing and SEPARATE popsicle stick bridge. One Paper Bridge and one real Technical Drawing/POPSICLE stick bridge.

Step 2: Complete worksheet in GCR, THEN draw your dream bridge that addresses the needs of your stakeholders.

Once done with the worksheet, and your bridge. Bring your computer to Mr. Kasper, AND your bridge drawing. Mr. Kasper will grade on the spot, and release you to start building your real bridge.

Step 3: Once you get approval from Mr. Kasper to build your bridge, you must decide what type of Truss bridge to build. You must decide from 6 different types of Truss bridge designs.

Truss Bridge Designs: Pick One

Step 4: Once you have picked a design, you must do a technical drawing of the bridge. It must be done like the lego technical drawing- an exact 1 to 1 drawing of what you are going to build- it must be the exact design you use. For those of you that have 2 bridges, you only have to do 1 technical drawing. You may modify it as you see fit. (REMEMBER: THESE ARE PROVEN REAL WORLD WORKING DESIGNS.)

Step 5: Watch Bridge Tutorial #1 AND #2 Before you start doing your Technical Drawing

Bridge Tutorial #1

Bridge Tutorial #2

Bridge Design Requirements

All Bridges

- No sandwiching of sticks more than 3 if its used as a joint or 2 if used as a beam
- Only Butt, Miter, or Gusset joints are allowed

Small Bridges

- Small bridges must have an internal road bed of 2” (Will be measured) ROAD DOESN'T HAVE TO BE COMPLETED
- Small bridges must support 20 lbs. apiece
- Small bridges must span a minimum of 7” and use a minimum of 50 popsicle sticks & a maximium of 60 popsicle sticks

Large Bridge

- Large bridges must have an internal road bed of 3.5” (Will be measured) ROAD DOESN'T HAVE TO BE COMPLETED
- Large bridges must support 40 lbs. apiece
- Large bridges must span a minimum of 14” and use a minimium of 100 popsicle sticks & a maximium of 120 popsicle sticks

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