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I’ve been teaching bridge-building and crane-building to middle and high school students in the Portland metro area since 1997. The kids and I have built everything from small cranes
To contact me go to info@portlandjib.com
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/DSC00080.JPG.w560h420.jpg)
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/fernwoodcrane.jpg)
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/06/long-boom-crane.jpg)
To a crane that could lift a 140 pound kid.
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/eliaslift.JPG.w560h420.jpg)
This crane , with a 16ft long boom, could lift 3 kids.
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/16ftderrick.jpg.w560h377.jpg)
We built small truss bridges.
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/hangingtruss2.jpg.w560h372.jpg)
This 12ft long arch bridge held the entire class.
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/web1.jpg.w560h371.jpg)
The towers of this suspension bridge were 40ft apart. The bridge was rated at 4 tons.
![](https://cloudliftdesigns.com/portlandjib/wp-content/uploads/2021/05/40fter.jpg)
The team from the Arbor School of Arts and Sciences used this model crane to learn about torque.
They learned how to compute how much counter-weight was needed to prevent the crane from tipping over.