Moving Optical Tables
click on the images to get a better view
For this job, you will need
Since the hoist's maximum tong lift is just over 5', so you can't flip a table wider than
- the CROWN Hoist,
- the two yellow straps,
- a stainless steel bar (1" in diameter),
- 3 long 4"x6" boards,
- and two carts (not pictured).
The table pictured here is a 4'x12'x12" and probably weighs close to 1500 lbs.
Start by lifting the table up with the hoist, taking off the legs, and laying it
down on the three boards.
The next step is to strap the table. Notice the orientation
of the crank, and hooks.
This is pretty critical and there's only one way which doesn't
lead to munching
the straps or a critical failure when lifting. The assembly is done
in situ with
hoist tongs just above the table (see previous pic).
The strap spacing is set at around 6" and determined by the tongs - see next pics.
The above picture shows the straps fully engaged (i.e. the table is lifted slightly), and
it is very important to slowly engage the straps
and check that everything is
okay with the straps before proceeding. In particular,
keeping the hooks from
pinching or munching the straps is key.
We usually do this with the hoist tongs
as close together as possible and centered.
The width of the tongs sets the 6" strap separation.
Ideally the weight is equally distributed between the two straps.
With the straps secure, you can raise the hoist tongs.
While carefully driving forward...
Once the table is vertical, you can use the palet jack (not pictured)
to raise it up
off the boards and slide under the carts.
This can be done with the hoist in place for safety.
Little rubber pads are sometimes used between the
1/4" stainless skin and the carts
to insure the table doesn't slide around on the carts.
Pushing the table around inside is fairly safe if you're
Obviously, whenever possible tilt the table back down and roll
it on the carts lying down
or use the crown hoist which is quite powerful.
rounding corners requires some teamwork...
the cart wheels sometimes need to be kicked into the correct
Finish the job by lowering the table to do the final manuvering.
Rough positioning can be done with the carts or with the hoist,
but final tweaking
(0.25" accuracy with a little practice) is
done with the table raised up to the leg level height
just before lowering
it onto the legs.
Hint: before raising the table up on the hoist tongs, put a slim (.75") board at the
the tongs and this will help to keep the table level on the hoist so that
you lower it on the legs it will land symmetrically.