How to build a Cantilever Bridge

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25 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Project sheets produced by Adam

Smith College YESC

How to build a Cantilever Bridge





















Instructions:


1)

Make the girders first by cutting and folding the following using the card.









Make 12 of these. 4 will be cut to 25cm in length for the 4 main central girders, the rest wi
ll be cut to
size to produce the side beams. Can you think of something inventive to do with the off cuts?



2)

Make the top cap and cason next. Cut and fold the following into the remaining pieces of card















Top cap


Cason

Girders

Roadway

What you will need:

4 sheets of A4 stiffened card.

Glue

5

cm

1

cm



30
cm



9cm


2cm


9cm

2cm


14
cm

14
cm

Project sheets produced by Adam

Smith College YESC


Cut and glue the tabs into place to

create the cason and top cap.


3)

Next, make the roadway. Cut and fold the following from the remaining piece of card














4)

The bridge can now be assembled. Start by sticking the upright central girders into the cason and
fit the top cap. Next, cut t
o size the side arms, glue into position and fit the roadway.


Can you think of any way to improve your design? Try testing its strength under different weights.
Think § bridge could last as long as our Forth Rail Bridge?

10
cm

2
cm



30
cm



Legend:


Cut



Fold