to make your own small crane is easy by mount a hoist to a H steel, but people always think it is complicated to make, here is a tutorial made by simba, hope that will help

1. Hoist Mounting Tutorial
WEIHUA GRUOP

2. 1.Lets see from the sketch drawing, to mount
a hoist to a H steel, you need a hoist trolley
mechanism as marked in the sketch above
which is included inside the package we
quoted, let’s see the real object below:
2.The mechanism includes three parts: A. the
driving mechanism; B. Supporting wheels. C.
Rigid Bolts.(2 pcs), see picture below;

4. 3.Hung the driving mechanism and supporting
wheels on the under flange of the
recommended H steel, like this:
and adjust the screw to a proper position so
that the WHEELS could the run on the H steel
flange smoothly.

5. 4.The bolts are used to lock the hoist trolley
to the H steel as well as to carry the hoist
through the locking point:
Like this:

6. 5.The complete hoist set we quoted to you
includes: