Wood Bridge Contest (800 points)
1. Bridge Research Worksheet (100 points)
2. Drawing bridge full scale on graph paper (100 points)
3. Bridge Construction (100 points each side, 400 points total)
* -2 points for every 1/4" outside the specified bridge size requirements
4. Bridge Testing (200 points) Testing Rubric Below.
Bridge Requirements
Length: Must be between 8" and 11" long
Height: Must be between 4" and 8" tall
Width: Must be between 2" and 4" wide
*No parts of your bridge may be solid. (i.e. a finger must be able to poke through any side of your bridge multiple times).
* -2 % points for every 1/4" outside the specified bridge size requirements
Bridge Testing Grading Rubric
A = 40-50 pounds held
B = 30-39.9 pounds held
C = 20-29.9 pounds held
D = 10-19.9 pounds held (i.e. 10 pounds held = 60 D, 19 pounds held = 69 D)
F = 9.99 pounds held or less
50 lbs. held = 100 A. For each additional pound held, one point extra credit will be awarded.
2. Drawing bridge full scale on graph paper (100 points)
3. Bridge Construction (100 points each side, 400 points total)
* -2 points for every 1/4" outside the specified bridge size requirements
4. Bridge Testing (200 points) Testing Rubric Below.
Bridge Requirements
Length: Must be between 8" and 11" long
Height: Must be between 4" and 8" tall
Width: Must be between 2" and 4" wide
*No parts of your bridge may be solid. (i.e. a finger must be able to poke through any side of your bridge multiple times).
* -2 % points for every 1/4" outside the specified bridge size requirements
Bridge Testing Grading Rubric
A = 40-50 pounds held
B = 30-39.9 pounds held
C = 20-29.9 pounds held
D = 10-19.9 pounds held (i.e. 10 pounds held = 60 D, 19 pounds held = 69 D)
F = 9.99 pounds held or less
50 lbs. held = 100 A. For each additional pound held, one point extra credit will be awarded.
| quarter.inch.graph.paper.pdf |
A full scale drawing of your truss must be symmetrical! Your road bed (bottom piece) may not fit on the same sheet of paper.
