Portlandjib.com
middle school projects
 

We used the BRIDGE BEAMS to build a small suspension bridge

We're also going to build a crane- much bigger than this one.

Here's the new crane. The crane body is almost double the size of the first crane .

The kids assembled this zip line hoist- in bridge building they call it a HIGH LINE.   The trolley is pulled back and forward by lines (string) that wrap around the large mahogany barrel.

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