Portlandjib.com
about
 

 
                         Elliot Apatov  teacher 
 
I've been teaching bridge-building and crane-building to middle and high school students in the Portland metro area since 1995.
    The kids and I have built everything from small cranes
. 

fernwoodcrane.jpg

I've used this crane with many middle school classes.

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16ftderrick.jpg

With a 16 ft boom and lots of counter-weight, this crane could lift half a ton.

With the proper counter-weight, we could lift a 140lb. live load

hangingtruss2.jpg

The bridges range from small models

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To a cantilever bridge

This 12ft laminated arch bridge is made of cedar and mahogany

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40fter.jpg

This 40 ft suspension bridge, is rated at 4 tons.
 
 

BRIDGE BEAMS started out as a toy for my niece's son Jake.

jakeblock.JPG

Then I decided to improve on the design.

I used lengths of  wood (alder), 3/4" thick, 1 1/2" wide, cut to different lengths

  

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  I drilled holes every 4", so I could use 3/8" dowels to connect the "beams".
Now you can stack and arrange the beams however you like to build-
a house, a zip line, a catapult.
   Once you add pulleys, a lazy susan, wheels and a windlass, you can design and build almost anything.  

loadtruck.JPG

The crane- the boom angle can change, and the whole crane swivels, - is loading a #3 beam onto the truck bed.
                                                  see BRIDGE BEAMS