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Product Resource Information

Scope

THE ALBERTA OH&S ACT, REGULATION AND CODE 2018, THE ASME B30.20-2018 STANDARD AND MANUFACTURERS OF PLATE CLAMPS ALL STATE THAT USERS OF PLATE CLAMPS MUST BE TRAINED IN THE SELECTION, INSPECTION, CAUTIONS TO PERSONNEL, EFFECTS OF ENVIRONMENTS AND RIGGING PRACTICES ASSOCIATED WITH THE PLATE CLAMP. FAILURES DUE TO MISSUSE HAVE RESULTED IN SERIOUS INJURIES AND DEATH. THIS SECTION WILL PROVIDE YOU INFORMATION ON THE SAFE USE OF PLATE CLAMPS.

Employer, Worker, User, Supervisor and Supplier Responsibilities

Users must be trained in the selection, inspection, cautions to personnel, effects of environments, and rigging practices associated with Plate Clamps

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Can you prove users are competent in the selection, inspection, cautions to personnel, effects of environments, and rigging practices associated with Plate Clamps ?

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If a user is not competent in the selection, inspection, cautions to personnel, effects of environments, and rigging practices associated with Plate Clamps they must have direct supervision from a competent worker

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If not competent in the selection, inspection, cautions to personnel, effects of environments, and rigging practices associated with Plate Clamps do users have direct supervision ?

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Do you have documented policies and procedures in the selection, inspection, cautions to personnel, effects of environments, and rigging practices associated with Plate Clamps ?

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An employer must identify responsibilities for the user of a Plate Clamp.

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The use of Plate Clamps can create hazardous situations

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Have Supervisors taken all precautions to protect the health and safety of every worker under the Supervisors supervision.

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Have Suppliers ensured the equipment supplied is in a safe operating condition, and that it complies with this Act, regulation and the OHS Code  

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Legislation, Standards and Specifications

Alberta Occupational Health and Safety. Act, Regulation and Code 2018

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American Society of Mechanical Engineers B30.20-2018, Below the Hook Lifting Devices, Chapter 20-6 Clamps.

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Manufacturer's specifications for the type and style of Plate Clamp.

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Manufacturer's referenced standards

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Design Factors

What are the manufacturer's design factors for the Plate Clamp you are using ?

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Markings

A Plate Clamp must be marked with the manufacturer's name and contact information

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A Plate Clamp must be marked with a serial number

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A Plate Clamp must be marked with its weight if over 100lbs (45kg)

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A Plate Clamp must be marked with its cold current amps (when applicable)

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A Plate Clamp must be marked with its rated voltage (when applicable)

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A Plate Clamp must be marked with its rated load

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A Plate Clamp must be marked with its ASME BTH-1 Design Category

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A Plate Clamp must be marked with its ASME BTH-1 Service Class

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A Plate Clamp must have attached product safety labels according to ANZI Z535.4-2011

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Training

It is important that all Plate Clamp users be knowledgeable about the safe and proper use, application of Plate Clamps, be thoroughly familiar with the manufacturer's recommendations, and safety material provided with each product. In addition all Plate Clamp users need to be aware of their responsibilities outlined in all applicable standards, regulations and policies

What are the training requirements for Plate Clamp users ?

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How does your company monitor the training requirements for Plate Clamps ?

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How have users been trained in the requirements for Plate Clamps ?

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Training records should be kept to show users were trained in the requirements for Plate Clamps

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Manufacturer's specifications for the Plate Clamp must be available to users

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Where are your manufacturer's specifications for the Plate Clamps kept ?

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How do you ensure users are familiar with the manufacturer's specifications ?

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Have employers identified hazards associated with the use of Plate Clamps ?

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Have users identified the hazards associated with the use of Plate Clamps ?

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Inspection Requirements

There are 4 types of inspection that are required to be carried out on Plate Clamps, these are Initial, Every Lift, Frequent and Periodic

All new and reinstalled Plate Clamps shall be inspected by a designated person prior to initial use

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All altered or repaired Plate Clamps shall be inspected by a designated person

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How often are every lift inspections completed ?

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What must be checked on an every lift inspection ?

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How often are frequent inspections completed ?

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What must be checked on a frequent inspection ?

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How often are periodic inspections completed ?

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What must be checked on a periodic inspection ?

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All Plate Clamps must have a documented periodic inspection completed by a qualified person

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All Plate Clamps that have been idle for a period of one month or more must be given a frequent inspection

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How does your company identify a Plate Clamp has had a periodic inspection ?

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Removal Criteria

A Plate Clamp must be removed from service if any of the following criteria deems that the Plate Clamp is not fit for use.

Damaged or inoperable controls

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Structural members that are deformed, cracked or have excessive wear

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Loose or missing guards, fasterners, bolts, covers, stops or nameplates

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Misadjustment of functional operating mechanisms and automatic hold-and-release mechanisms that interfere with the Plate Clamps operation

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Cracked or worn gears, pulleys, sheaves, sprockets, bearings, chains and belts.

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Excessive wear of friction pads, linkages, and other mechanical parts

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Excessive wear at hoist hooking ponts and load support clevises or pins.

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Excessive pitting or corrosion

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Excessive nicks or gouges

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Indications of heat damage

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Evidence of unauthorized welding, modificationor replacement of components.

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Improper assembly

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Gripping teeth that are, worn, broken, chipped or clogged

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Gripping surfaces that are contaminated, have wear, or lack gripping material

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Selection, Limitations and Use

All Plate Clamp users must be aware that their capacity may change depending on things such as type and size of material lifted, the sling angle, angle of lift and the environment it is used in.

Plate Clamps shall only be operated by qualified personnel, which includes, designated persons, trainees under the supervision of designated persons, maintenance and test personnel, and inspectors.

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Rated loads cannot be exceeded

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Loads must be correctly distributed

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Plate Clamps shall not be used to handle any loads for which they are not designed

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Plate Clamps shall be applied to the load in accordance with their instruction manuals

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Before operating lifting ropes or chains must not be kinks or twisted around each other

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Load temperature should not exceed the allowable maximum

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What is the minimum and maximum temperature the Plate Clamps can be exposed to ?

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Plate Clamps swinging should be kept to a minimum

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Shock loading must be avoided

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Mechanical damage must be avoided

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Do not stand or pass under a suspended load

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Do not ride on a Plate Clamps

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Do not use the Plate Clamps to side pull or slide a load

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Suspended loads must not be left unattended

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Maintenance

A maintenance program must be established and be based on recommendations made by the Plate Clamp manufacturer, a qualified person may also include additional recommendations based on their review of the Plate Clamp application and operation.

"Before adjustments are started all sources of power must be disconnected, locked out, and tagged ""Out of Servce"" "

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"Before repairs the Plate Clamp must be tagged ""Out of Servce"" "

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Only Qualified persons shall perform adjustments and tests

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Only Qualified persons, or those under the direction of a qualifed person shall perform adjustments and repairs

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Replacement parts must be at least equal to the original manufacturer's specifications

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Any hazardous condition disclosed during inspection must be corrected before normal operation of the Plate Clamps is resumed

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After adjustments and repairs the Plate Clamps must not be returned to service until it has been inspected

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Dated records of repairs and replacements should be made

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Misconceptions

Misconception 1. If you have attended a training course you are a competent rigger.

Training is only one part of being competent to carry out your job, you must also be adequately qualified and have sufficient experience.

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Misconception 2. Plate Clamps can be used at various temperatures without affecting their capabilities or application.

Temperature ranges can vary from manufacturer to manufacturer and must be confirmed by the user. The manufacturers specifications must be reviewed prior to use.

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Misconception 3. The thickness of material being lifted does not matter as long as you stay within the ranges marked on the plate clamp.

Some clamps can lift material thicknesses from zero up to the maximum jaw width, but some clamps are restricted to a minimum thickness. Usually as the WLL of the clamp increases the minimum thickness of material it can lift increases. 

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Misconception 4. Plate clamps have no minimum weight requirements as long as the jaw is able to grip the material and is within its maximum rating.

Plate clamps are expected to have a minimum amount of weight attached to them when lifting to ensure the jaw engages correctly. This minimum rating can vary from manufacturer to manufacturer, the manufacturers specifications must be reviewed prior to the plate clamps use.

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Misconception 5. Plate clamps can be used at various horizontal angles when attached to the load.

Universal Plate Clamps that are designed to be used at all angles, but not rated at full WLL for all angles. As the clamp is used away from the vertical the rating of the clamp will reduce. How much it reduces at the various angles may defer from one manufacturer to another.

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Misconception 6. Load material does not matter.

Plate clamps are designed with a variety of teeth patterns so they can be used on a variety of different materials. There is no clamp that is suitable for all materials as some teeth may not grip some materials safely and others may damage the material they are lifting. 

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Misconception 7. Plate clamps can lift multiple plates at the same time.

The majority of plate clamps are not designed to lift multiple plates, as it is impossible to ensure the plates will not slip out from between each other when being lifted.

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Misconception 8. Plate Clamps are rated at both vertical and horizontal angles.

Some "universal" plate clamps can lift in both the horizontal and vertical planes, but many plate clamps can only be used for vertical applications.

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Misconception 9. Plate Clamps are designed for flipping loads.

Many plate clamps cannot be used for flipping loads as they are restricted to vertical lifting only. Consult the manufacturer specifications for limitations of the plate clamp being utilized.   

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Misconception 10. Plate Clamps are designed for vertical lifts only.

Some plate clamps are only designed for vertical lifts but this is not always the case. Some "universal" plate clamps can lift in both the horizontal and vertical planes, consult the manufacturer for the plate clamp limitations.  

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Misconception 11. There is no maximum amount of tooth wear.

The teeth along with the camsegment in the jaw are what grips the material being lifted, the amount of wear allowed on these is strictly governed and needs to be monitored. In some cases the allowable amount of wear is as little as 50% of one tooth.

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Misconception 12. Plate Clamps can be used without consulting the manufacturers specifications.

The operator shall be instructed in the use of the device by a designated person. Instructions should include the manufacturer's suggested operating procedures. It is an operators responsibility to understand the lifting device's functions and limitations as well as its particular operating characteristics

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