Gantry Crane

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The Gantry Crane Project

A very good friend had some scrap steel. He told me if I wanted it to come and get it.  As usual I wasn't sure what he was offering but I went anyway.  Grandpa always said to never look a gift horse in the mouth.  I was shocked at what he was giving me.  Seven pieces of 8 inch I-beam.  The shortest piece was a little over 20 feet and the longest was about 27 feet.  They all had a 4x0.5 inch flat bar welded on edge on the top of the beam.  This was for extra rigidity for some kind of trolley crane in a large warehouse. One piece had a 10 inch I-beam with one web cut off, welded on in the same fashion as the 4" strap. I'm not sure what it was for as I didn't get to see it before it came out.  When I got there it was all in a big pile. The building was being demolished and that's how I ended up with a small fortune in I-beams.  At the time I was tempted to pass it up but I took it anyway.  I wasn't sure what I would do with it but I knew I would think of something.

    It took a while as I carefully removed the strap from most of the pieces I knew that old mobile home frame would come in handy some day

The mobile home frame was another freebie.  I wasn't sure what I would do with it but it makes a great place to store these beams and keep them off the ground The first step was to build the uprights.  I had to break down and  buy a piece of 3 1/2" box. Both uprights built. Now for the track system. I use 4 pieces of 6" C channel. This is a very high tech leveling device. I have a bucket of water setting on top of a trash can that has a clear plastic hose attached. I  use the 2x4 to check for high/low spots for the track. This allows me to use the water level  without bending over
Using my home made high tech leveling device, I make sure both tracks are close to the same height.   I used green food coloring in the water to make the level easier to use.  
  As usual, I am working alone and I had to figure out a way of getting the top beam in place.  I used my engine hoist on top of the trailer for the extra height I have the hoist tied down with a come-a-long. A chain around the trailer and hoist as a backup in case the cable lets go. I built a small extension for the lift! The beam is about 15 ft long. I left the 4" backbone  strap on this piece. I lifted it about a foot off the trailer and left it there for a couple of hours to test both the lift extension and the hydraulic jack.
 
Went up with no problems at all.  I sure was glad to get it set on top the uprights so I could quit worrying about it crashing down.    
   
As an after thought I welded large rebar on both sides to make a ladder. This will make it easier to install the trolleys &  hang the hoists. This trolley & Hoist was an eBay special $80.00 for both plus the drive to Tampa to pick it up.    
       

 

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This page was last updated 03/19/12