Guide to Chain Hoists
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This product is intend for trained and competent persons and should only be considered as a guide only.
TSA takes no responsibility for any information a person uses from this documentation.
Please consulate a professional on the best product for your use
Chain Hoists
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Standard Basic Hoist Diagram
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
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Gearing
Electro-magnetic Brake
Limit Switch
Electro-magnetic Contactor
Reverse Phase Relay
Chain Container/Bag
High Strength Chain
Lower Hook
Push button cable & Cable Relief
Push button Switch
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Don't operate a damaged, malfunctioning or unusually performing chain hoist.
Don't apply load if bearing prevents equal loading on all load supporting chains.
Don't operate the chain hoist until you have thoroughly read and understood the
Don't operate beyobeyond the limits of the load chain travel
load.
Don't lift more than rated load for the chain hoist.
Don't leave a load supported by the chain hoist unattended
been taken.
Don't operate a chain hoist unless it has been securely attached to a suitable support.
Don't allow the load chain or hook to be used as an electrical or welding ground.
Don't use chain hoists with load chains that are knotted, twisted, kinked, damaged, or
worn.
Don't allow the load chain or hook to be touched by a live welding electrode.
Don't remove or obscure the warnings on the chain hoist.
Don't use the chain hoist to lift, support, or otherwise transport people, without additional
or mandatory local or national safety precautions.
Don't move a load in any manner that can endanger persons.
Don't operate a chain hoist on which the safety placards ordecals are missing or illegible.
Don't operate a chain hoist unless load slings or other approved single attachments are properly
sized and seated inthe hook saddle.
Don't operate unless all persons are and remain clear of the supported load.
Don't allow your attention to be diverted from operating the chain hoist.
Don't operate unless load is centered under chain hoist.
Don't use limit switches as routine operating stops. - They are emergency devices only.
Don't allow the chain hoist to be subjected to sharp contact with other chain hoists, structures,
or objects through misuse.
Don't operate a chain hoist when it is restricted from forming a straight line from hook to
hook in the direction of loading.
perform such adjustments or repairs.
Don't attempt to lengthen the load chain or repair damagedload chain.
Don't use load chain as a sling, or wrap the load chain around load.
Don't drag the load chain and/or chain hook across dirty,sandy of abrasive surfaces (concrete
Don't apply the load to the tip of the hook or to the hook latch.
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DO make sure that the weight of the load to be suspended is known, and in accordance to
the lifting capacity of the chain hoist. In multiple lifts make sure a rigging plot is present.
Do always keep your attention to the chain hoist and the load that it is supporting.
Do use hook latches. Latches are to retain slings, chains, etc. under slack conditions only.
Do make sure that the hoist operator is in good physical and mental condition.
Do check the chain hoist, suspension-hook, chain-hook, hook latches, as well as the loadchain itself, prior to each time of use for any damage, deformation or malfunction.
Do make sure that the structure from which the chain hoist is suspended, as well as the
slinging equipment is able to safely absorb the force resulting from the weight of the load
and the chain hoist itself, multiplied by the dynamics of starting and stopping the lifting
action. For a Prolyft hoist for example it is approximately 1. 4 times the static load.
Do make sure the hook latches are closed and not supporting any parts of the load.
Do make sure the load is free to move and will clear all obstructions.
Do make sure the power (and control) cables and connectors have proper stress relieves and are
never fully tight during lifting or lowering movement.
Do warn personnel of an approaching load.
Do check brake function by tensioning the chain hoist prior to each lift operation.
Do avoid swinging the load or hook.
Do shut down a chain hoist that malfunctions or performs unusually and report such
malfunction.
Do inspect the chain hoist regularly, replace damaged or worn parts, and keep appropriate
records of maintenance.
Do make sure hook travel is in the same direction as shown on the controls.
Do use a protective cover for the chain hoist to prevent exposure to rainfall when applied
outdoors.
Do guide the chain hoist to take up slack chain carefully without twisting or knotting.
Do make sure load is balanced and load holding action is secure before continuing lifting
operation.
Do only use factory recommended parts when repairing the unit.
Do protect the load chain from weld splatter or other damaging contaminants.
recommendations.
Do always keep your attention to the chain hoist and the load that it is supporting.
.
Do use hook latches. Latches are to retain slings, chains, etc. under slack conditions only.
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Operation Statement
The use of any chain hoist presents some risk of personal injury or property damage.
That risk is greatly increased if proper instructions and warnings are not followed.
Before using this chain hoist, each operator should become thoroughly familiar with
all warnings, instructions, and recommendations in the manufactures requirements
and manual.
Keep all documentation for hoist in a common area for full access for operators and
future reference and use.
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Operation
Below are the basic operation guide lines to a chain hoist:
Ensure hoists are within appropriate test date and the load being lifted is within the hoists W.L.L
Lift the load so it is just off the ground. (this enables you to check the load has been rigged correctly)
Once at desired height E-stop the chain hoist and power down the hoist(s).
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Suspending Loads vs People
The suspension of loads over people demands the highest level
of rigging knowledge, equipment, and equipment maintenance.
The hoist must be installed and used in accordance to local and
national standards and regulations when suspending loads over
people. These include the following important precautions.
1. It is preferred that the load always be tied off with an auxiliary
area
beneath the load is permitted.
2. As an alternative, the system may be designed in such way
that malfunction or failure of one chain hoists load bearing
components does not cause load loss and/or overloading of any
other chain hoists in the system. Note that in such a system,
chain hoist performance and function must be monitored
visually or should be monitored using load cells.
3. Never operate the chain hoist while people are under the load.
Things to remember
Even though the basic operation of a chain hoist(s) can seem simple, they can be very
should only be operated by competent persons
dangerous and
Periodic maintenance should be carried out to maintain the hoists safe working condition
You must never go over the systems
applied.
W.L.L for operations - Including any dynamic loadings that may
Your chain hoists MUST
necessary manufacture & Australian Standards (AS 2550.1 & AS1418.1)
Annually to ensure it meets the
No well maintained hoist should be noisy, squeaks and knocks are signs of wear and tear, possible
defect and could arise to larger problems if left unattended
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Remember! If you are ever unsure or have any
questions regarding operation or servicing of a
person.
We are always on hand at TSA to give free advice
and answer any questions you may have no matter
how big or small they may seem.
Call Us on (07) 5574 5327
www.theatresafe.com.au
[email protected]
www.theatresafe.com.au
[email protected]
www.facebook.com/theatresafeaustralia
This product is intend for trained and competent persons and should only be considered as a guide only.
TSA takes no responsibility for any information a person uses from this documentation.
Please consulate a professional on the best product for your use
References
http://www.hitachi-ds.com/hitachi-ds/en/Products/Hoist/Electric-Chain-Hoist.html