Personnel Cage

Discussion in 'Administrative & Legal Requirements' started by CindyB, May 28, 2014.

  1. CindyB

    CindyB New Member

    Hi all,

    We are keen to manufacture a personnel cage which can be attached to our forklift so that staff can work from heights.
    This is basically just to take things off an elevated storage area, and to change bulbs when needed.

    Do you have any idea what the regulations have to say about what the standards must be for the Personnel Cage?

    Your input will be greatly appreciated.
  2. Neil Enslin

    Neil Enslin Moderator

    Dear Cindy,

    DMR 18 (8) states the following: "No user of machinery shall require or permit any person to be moved or supported by means of a lifting machine, unless such machine is fitted with cradle approved for that purpose by an inspector"

  3. Change Agent

    Change Agent Member

    Hi Cindy

    Neil quoted the regulations correctly, but did not answer your question.
    Generally the cage should be constructed of angle iron and must be 1 x 1.2 meter ( the size of a pallet) with enclosed sliders (channel iron) for the forks and a solid metal floor. Then it needs to be fitted with guard rails at 900 to 1200 mm high with a lockable gate. The edges must be fittted with a kick plate (toe board) of 150 mm or the bottom section can be covered with diamond mesh.
    The back (Nearest to the forklift) must extend to a height of 1,8 meters and the entire area covered with diamond mesh to prevent a person from getting into contact with the lifting mechanism. This might effect the functionality for changing light bulbs as it may reach too far and not leave enough head room.
    Lastly it must be fitted with chains or other means of securing it to the mast of the forklift to prevent accidental detachment whilst suspended.

    BUT, as Neil said, you need to get the inspector's approval. So I suggest you make a design sketch and apply for permission to use a cage based on that design, then you can manufacture it and use it.
    Another point to remember in using this cage is that it becomes a lifting attachment and are subject to all applicable tests and inspections, including a certificate to state the maximum mass load, which will need to be displayed on the cage. (Max number of persons + tools).

    Once you get all this, you need do a risk assessment and write up a SOP and train your operators that no person are allowed to be lifted while in motion.

    Regards and good luck. It has been done before, so I cannot see why the DOL will not approve the design.
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    Last edited: May 31, 2014
  4. Brian

    Brian Member

    Excellent response and a very informative answer,was there also not something in there about the man cage needing to be designed by a structural engineer or something like that.
  5. Pierre Terblanche

    Pierre Terblanche New Member

    Hi All, I come into this discussion at a late stage but I think it is still important.

    Neil is correct regarding the legal requirements in DMR 18(8). But the DoL has issued a guideline to all there inspectors when to "grant permission" (OHS Directive 015). There are general and specific requirements. The specifics relate to "cradles" use on a)

    Quoting from the Directive (General requirements) :

    4.3 The inspector must satisfy himself that the cradle meets the following conditions:-

    4.3.1 The design and construction of the cradle must be certified by a professional engineer,
    certificated engineer or professional technologist.

    4.3.2 The construction of the cradle must be robust and free from patent defects.

    4.3.3 The method of attachment between the cradle and the lifting machine of the hoist rope
    must be such that accidental disconnection cannot take place.

    4.4 If satisfied, the inspector may grant permission subject to compliance with the
    conditions outlined in either proforma A or B. “Schedule of Conditions”

    The specific requirements for lift trucks are (also quoted verbatim) :

    1. The cradle is to be manufactured strictly in accordance with the drawing supplied with the application.

    2. It shall be enclosed on all three sides to a height of al least 1 200 mm and the side on the mast side
    2100mm above the cradle floor which shall be of a substantial construction and capable of supporting the
    designed maximum load safely.

    3. The cradle and all welding work shall be subjected to effective quality control during its various stages of
    construction by a competent person who shall ensure compliance with condition 1 and in addition that:

    3.1 all welding work is carried out by trained welders;

    3.2 the welding work complies with an acceptable welding code;

    3.3 the welding work is free of any defect likely to reduce its load carrying capacity; and

    3.4 the welds are of such thickness that the allowable stresses for the welding rod in use is not exceeded
    when considering the dynamic and static forces the cradle is likely to be subjected to when in use.

    4. The forklift truck used for that purpose must be examined by the person contemplated in condition 3 to
    ensure that it complies with the regulations before the lifting of persons may be permitted. For
    successive lifts on the same day it need only be examined before the first lift. The results of such
    examinations must be entered into a record kept for that purpose on the premises.

    5. The cradle shall be secured to the lift truck in such a manner that accidental disconnection of the cradle
    cannot take place.

    6. Where reasonably practicable, the cradle is to be provided with a switch electrically interlocking such
    cradle to the ignition of the lift truck to prevent unexpected starting of the engine and movement of the lift
    truck whilst persons occupy the cradle.

    7. The moving or supporting of persons in suspension in the equipment shall only be done under the
    supervision of the person contemplated in paragraph 3 who shall ensure that–

    7.1 only trained and certified lift truck drivers are used in the operation;

    7.2 the lift truck remains stationary whilst persons occupy the cradle;

    7.3 all persons occupying the cradle are secured to the cradle by means of full body safety harness.

    8. The maximum number of persons to be carried and the safe maximum load carrying capacity of the
    cradle for which it has been designed is to be conspicuously marked on the cradle.

    Other comments :

    I am the convenor of a Working Group for SABS TC110 Lift Trucks, responsible for the drafting of a manufacturing standard for non-integrated work platform for use on lift trucks ("cradles) (WD583). This standard aligns with the requirements of the Directive but a lot of other safety issues have also been addressed. We (the TC) expect that once published, this standard will be incorporated into the DMR 18.

    The lifting industry is currently awaiting the publication of the revision of DMR 18 (Expected end Sep 2014) This Regulations will include a Schedule of incorporated standards. The above mentioned standard will probably be added to the list with the expectation that BS EN 14502-1 2010 Cranes Equipment for lifting people- Suspended baskets will already be included for cradles below-the-hook.

    Please contact me if you need more information.
  6. Stevew

    Stevew New Member

    Has the standard been completed yet?