Bridge Project Rubric - Loudoun County Public Schools
2nd Quarter Bridge Project
Purpose: to study the structural properties of bridges
to build a bridge and test is support capacity
to learn about science references and resources
Materials: balsa wood sticks (36 x 3/32 x 3/32 inches)
Purchase from Michael’s in Sterling. Ask for the type that Dr. Krovvidy
Ordered.
Elmer’s wood glue
Procedure: build a bridge that will span 30 (L) cm x 8 (H) cm x 8 (W) cm or less
bridge mass cannot exceed 20 grams
complete a force diagram showing the structural support
write a report about your style of bridge
Calculation: your bridge must be able to support 1000 times its mass
Report: a typewritten report on bridges with photographs (2 pages)
do a brief introduction explaining the different types of bridges
include history and physics of bridges, emphasis on the type
you chose
identify the structural components of your bridge
write on your team’s experience and procedure used
use reference books, science or engineering texts; refer to
internet web sites; document all sources of information
Grading: 3 to 4 students on each project team
all participants get the same grade
each student must participate equally
grade standard: see reverse
Due Date:
Final Results:
bridge name:_________________ Team: _______________
mass of bridge: __________ g _______________
support mass: __________ g _______________
support ratio: __________ ________________
Grading Rubric
Summative: Bridge Support structure / Design: 30 + 30 = 60 points
Formative: Report / Force Diagram : 40 points
Do NOT make a Beam Bridge EVER!!
|Bridge Project Rubric |
|Looking For… |Way! |Part Way |No Way |Scoring |
| | | | |Quality of Report |
| | | | | |
| | | | |/10 |
|Report – Documentation |Bibliography with wide |Partial listing of one or |Bibliography missing |Documentation |
| |selection of references from |two references | | |
| |books, periodical and internet| | | |
| |sites | | |/5 |
|Force Diagram – your bridge |Accurate drawing of your |Drawing is missing one or |Drawing does not |Bridge Diagram |
|diagram |bridge – not every stick needs|more critical structures |represent the bridge at| |
| |to be shown | |all |/10 |
|Force Diagram – Vector lines |Force vectors lines with |Some force vector lines are |Force lines are missing|Vector Force Diagram |
| |arrows accurately display how |accurate, but important ones|or do not show that | |
| |the bridge supports the road |are missing |structure at all | |
| |surface | | |/10 |
|Bridge structure – Mass |Calculate the mass to support |Calculate the mass to |Calculate the mass to |Ratio > 50:1 15 pts |
|compared to support amount |ratio and it exceeds 100 : 1 |support ratio and it is |support ratio and it is|Ratio > 75:1 18 pts |
| |by a considerable margin |between 50 and 100 : 1 |less than 50 : 1 |Ratio > 100:1 20 pts |
| | | | |Ratio > 500:1 25 pts |
| | | | |Ratio > 600:1 26 pts |
| | | | |Ratio > 700:1 27 pts |
| | | | |Ratio > 800:1 28 pts |
| | | | |Ratio > 900:1 29 pts |
| | | | |Ratio > 1000:1 30 pts |
|Bridge structure – Design and |Bridge uses or modifies one of|Bridge copies a trivial |Bridge design shows |Creativity/Workmanship |
|creativity, workmanship |the standard structural types |design type with little |very little thought or | |
| |with creativity and ingenuity.|imagination |design creativity | |
| |Neat and without glue sticking|Somewhat neat, some glue |Messy, irregular, with | |
| |out |showing |splinters & glue | |
| | | |showing |/30 |
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