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Statutes

 

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Dock Workers (Safety, Health & Welfare) Regulations, 1990

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Regulations

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PART VI

SPECIAL PROVISIONS

SCHEDULE I

[See regulations 41 (1), 47 (1) and 48 (1)]

Manner of test and examination before taking lifting appliance, loose gear and wire rope into use for the first time.

Test loads:

(1) Lifting Appliance:

Every lifting appliance with its accessory gear, shall be subjected to a test load which shall exceed the safe working load (SWS) as follows:-

Safe working load                                  

Test load

Upto 20 tonnes

25 per cent in excess of SUL

20 to 50 tonnes
Over 50 tonnes                                     

5 tonnes in excess of SWL
10 per cent in excess of SWL

(2) Loose gear:

(a) Every ring, hock, chain, shackle, swivel, eyebolt, plate clamp, triangular plate or pulley block (except single sheave block) shall be subjected to a test load which shall not be less than the following:

SWL (In tonnes)                        

Test load (In tonnes)

Upto 25

2 X safe working load

Above 25                                  

(1.22 X SWL)+20

(b) In the case of a single sheave block, the SWL shall be the maximum load which can safely be lifted by the block when suspended by its head fitting and the load Is attached to a rope which passes around the sheave of the block and a test load not less than four times the proposed safe working load shall be applied to the head of the block.

(c) In the case of a multi sheave block, the test load shall not be less than the following:

SWL (In tonnes)                        

Test load (In tonnes)

Upto 25

2 X SWL

25 to 160
Above 160                                

(0.9933 X SWL)+27
1.1 X SWL

(d) In the case of hand-operated pulley blocks used with pitched chains and rings, hooks, shackles or swivels permanently attached thereto, a test load not less than 50 per cent in excess of the safe working load shall be applied.

(e) In the case of a pulley block fitted with a bucket, the bucket shall be tested and the load applied to the bucket when testing that block will be accepted as test loading of the bucket.

(f) In the case of a sling having two legs, the safe working load shall be calculated when the angle between the legs Is 900 in case of multi-legged slings the safe working load shall be calculated as per national standards.

(g) Every lifting beam, lifting frame, container spreader, bucket, tub, or other similar devices shall be subjected to a test load which shall not be less than that given in table below:

Proposed safe working  
(In tonnes)                    

Test load (In tonnes)

Upto 10

2 X SWL

10 to 160
Above 160                                

(1.04 X SWL)+9.6
1.1 X SWL

(i) Wire ropes: In the case of wire ropes a sample shall be tested to destruction. The test procedure shall be in accordance with an international or recognised national standards. The safe working load of the rope is to be determined by dividing the load at which the sample broke by a co-efficient of utilisation determined as follows.

Item                 

Co-efficient of utilisation

(a) Wire rope forming part of                        SWL of the sling:

SWL of the Sling

SWL upto and equal to 10                        tonnes....

5

Co-officienct of utilisation            SWL above to tonnes and up              and equal to 160 tonnes       

104
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(8.85 X SWL ) + 1910
3

(b) Wire rope as Integral part of a lifting appliances:
SWL of the lifting appliances:SWL upto and equal to 160 tonnes...........    
SWL above 160 tonnes.......                                    

104
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(8.85 X SWL ) + 1910

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(j) Before any test is carried out, a visual inspection of the lifting appliance, or loose gear involved shall be conducted and any visible defective gear shall be replaced or renewed.

(k) After being tested all the loose gears shall be examined to see whether any part have been injured or permanently deformed by the test.

PROCEDURE FOR TESTING

(3) Ship's derricks:

(a) A derrick shall be tested with its boom at the minimum angle to the horizontal for which the derrick is designed (generally 15 degrees) or at such greater angle as may be agreed. The angle at which the test has been carried out shall be mentioned in the test certificate. The test load shall be applied by hoisting moveable weights. During the test the boom shall be swung with the test load as far as practicable in both directions.

(b) A derrick boom designed to be raised with power with the load suspended shall in addition to the above tests at (a), be raised (with the load suspended) to its maximum working angle to the horizontal and the two outermost positions.

(c) While test loading of a heavy lift derrick, the competent person responsible for test using moveable weights shall ascertain from the Master that the ship's stability will be adequate for the test

(4) The derricks tested under Cl. (3) shall not be used in union purchase rig unless:

(a) the derricks rigged in union purchase are tested with the test load appropriate to the SWL in union purchase (at the designed headroom and with the derrick booms in their approved working positions);

(b) the safe working load of that derrick in union purchase rig has also been specified by a competent person in a report in Form III;

(c) any limitations or conditions specified in the said report are complied with; and

(d) the two hoist ropes are coupled together by a suitable swivel assembly.

Note.-The safe working loads of derricks (for each method of rig including union purchase) shall be shown on the Certificate of test and marked on the derrick booms.

(5) Lifting appliance other than ship's derricks and winches:

(a) The test load shall be lifted and swung as far as possible in both directions. If the jib or boom of the crane has a variable radius, it shall be tested with test loads at the maximum and minimum radii. In case of hydraulic cranes, when owing to the limitation of pressure it is impossible to lift a test load in accordance with table under paragraph (1) it will be sufficient to lift the greatest possible load which shall be more than safe working load.

(b) The test shall be performed at maximum minimum and intermediate radius points as well as such in the arc of rotation as the competent person may decide. The test shall consist of hoisting, lowering, breaking and swinging through all positions and operations normally performed. An additional test shall be made by operating the machinery at maximum working speed with the SWL suspended.

(6) Use of spring or hydraulic balances, etc., for test loading:

All tests normally shall be carried on with the help of dead weights. Test loading of gear on new ships shall always be with dead weights. In case of periodical test, replacements or renewals, test load may be applied by means of a suitable spring or hydraulic balances. In such case, test load shall be applied with the boom as far out as practicable in both directions. The test shall not be taken as satisfactory unless the balance has been certified for accuracy by the competent authority within 2.0 per cent and the pointer of the machine has remained constant at the test load for a period of at least 5 minutes.

(7) Testing machines and dead weights:

(a) A suitable testing machine shall be used for testing of chains, wire ropes and other cargo gear.

(b) Testing machines and balances to be used in test loading, testing and checking shall not be used unless they have been certified for accuracy at least once in the preceding 12 months by the competent authority.

(c) Moveable weights used for the test loading of the lifting appliances having a safe working load not exceeding 20 tonnes shall be checked for accuracy by means of suitable weighing machine of certified accuracy.

(8) Thorough examination after testing or test loading:

After being tested or test loaded, every lifting appliance and associated gear shall be thoroughly examined to see that no part has been damaged or permanently deformed during the test. For this purpose, the lifting appliance or gear shall be dismantled to the extent

 

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