• Store and handle power operated blocks correctly.
Inspect the block and accessories before use and before placing into
• For top hook suspension, use hooks that are fitted with
safety catches or mouse the hook and ensure the support fits freely into
the seat of the hook.
• For trolley suspension, ensure the trolley is
correctly set for the beam width.
• Check that the bottom hook will
reach its lowest point without running the chain or rope fully out.
Raise the load just clear then halt the lift to ensure the integrity of
the block before continuing with the lift. If the block has more than
one speed, start in the slow speed.
• Expose power
operated blocks to chemicals, particularly acids, without consulting the
• Expose power operated blocks directly to the elements,
water spray, steam etc without consulting the supplier.
• Replace the
load chain or rope with a longer one without consulting the supplier.
• Use the load chain or rope to form a sling.
• Change motions
without first allowing the motor to stop.
• Allow persons to ride on
power operated blocks.
Selecting the Correct Block
operated blocks are available in a range of capacities, designs and
suspensions with electric or pneumatic power options. Select the block
to be used and plan the lift taking the following into account:
of block - chain, wire rope - electric, pneumatic - class of use -
capacity and range of lift etc.
Type of suspension - hook, trolley,
Speeds and control - single speed, dual speed - pendant push
button, pull cord, remote etc.
Power operated blocks are designed for
vertical lifting only.
Consult the supplier if the block is to be
used in areas of high risk, exposed to the elements, water, steam etc,
with hazardous substances, eg acids or chemicals, or subjected to
extremes of temperature.
Storing and Handling Power Operated
Never return damaged blocks to storage. They should be dry,
clean and protected from corrosion.
In the case of blocks used for
temporary applications, store them on a purpose made rack or suspended
from their top suspension fitting. Trailing cables, pendants etc may be
removed, identified and stored separately to prevent loss or damage
whilst in store. In the case of blocks left in situ, park the block in a
suitable position so that it is protected from damage and does not
present a danger. Raise the bottom hook so that it is not a danger to
persons or liable to become accidentally engaged. Isolate the power
Installing and Commissioning
Follow the specific
instructions for installation and commissioning issued by the supplier
and the general requirements given overleaf. Ensure the controls work in
the correct direction and that motion limits are set and operate
correctly. If the block fails to operate correctly contact the supplier.
Using Power Operated Blocks Safely
Do not use defective blocks,
slings or accessories.Check the slinging arrangement, that the block is
safely rigged, that the chain or rope is not twisted and that the load
is free to move. Raise the load just clear, halt the lift to ensure the
integrity of the block, slinging arrangement etc. Always commence
lifting in the slow speed. Avoid unnecessary inching of the load.Check
the travel path is clear and that you have a clear view so
avoid accidental hook engagement or collision. Follow anyparticular site
safety rules applicable to the movement of suspended loads. Keep
fingers, toes etc clear when lowering loads.
Inspection and Maintenance
Follow the specific instructions for
maintenance issued by the supplier. These should be incorporated into
the site maintenance programme observing any particular needs due to the
site or working conditions.
Regularly inspect the block and, in the
event of the following defects, refer the block to a Competent Person
for thorough examination: operational faults; block will not lift; slips
back; motion commands reversed; over-runs when command released; wear;
damage to trolley, hooks and fittings; damaged,worn or corroded chain or
rope; other visible defects.