Building Bridges:SECME Requirements

Building Bridges:Factors in Bridge Design - #1

What is the span of the bridge?Span means the length of the bridge from one side (bank) to the other – 40-50 cm in length

Building Bridges:Factors in Bridge Design - #2

What are the requirements?A block 35 cm in length and 4 cm in height must

be able to pass under it

36.0 cm – 35.0 cm = 1. 0 cm (length left)5.08 cm – 4.0 cm = 1.08 cm (underneath bridge)

NO room for a substructure (underneath roadway)

Building Bridges:Factors in Bridge Design - #3

What are the superstructure requirements?

The superstructure (part above the roadway) – 10 cm – 20 cm in height

_________

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10 cm – 20 cm

Building Bridges:Factors in Bridge Design - #4

What are the roadway requirements?

Must have a level surface (horizontal), called a roadway, that a Matchbox car can roll across

with a light push

Building Bridges:Factors in Bridge Design - #5

What are the roadway requirements?

Roadway’s width must be 5-10 cm

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5 cm –10 cm

Building Bridges:Factors in Bridge Design - #6

What are the weight requirements?

Total weight of the superstructure shall not exceed 110.0 grams (*Remember wood does

absorb moisture)

Building Bridges:Factors in Bridge Design - #7

What are the requirements?Design must have an opening in the middle of

the structure to allow for the test