The orchard's 9-meter high water tank tower is almost finished, and we need to lift the water tank on top. But without the proper lifting equipment, this turned out to be quite a challenge.
We fabricated a mini-jib crane by welding a 4-inch diameter GI pipe to one of the railing's posts. Then we fashioned an angle bar mast and jib to be inserted into the GI pipe.
Our first version was a disaster - the mast was just too long and not strong enough to carry the weight. The mast bent right at the top of the GI pipe, where the maximum moment occurred.
We shortened the mast to reduce the leverage, reinforced it along its critical section, then tried again.
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