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6. Operational Use

6.0 If slings cannot be identified from the certificate issued or otherwise found to be deficient, they must be removed from service. It is the responsibility of the owner of the slings to verify that slings being utilized have an accompanying certificate giving all relevant information as per Sections 2, 4.10, and 5 as applicable.

6.1 Mode factors - i.e. sling configuration, type of hook etc. - to be considered when determining the actual load allowed to be lifted and this load shall not be exceeded in order that the required safety factor is always maintained.

6.2 When slings have reached the parameters contained in the Wear Standards they are to be removed from service.

6.3 Other than when used in conjunction with a lifting frame or bar, only two slings are to be used on each lift.

6.4 Dragging of load bearing slings should be avoided at all times.

6.5 Where practicable, all efforts shall be made to protect slings from the exposure to sun and chemicals, water and any other adverse conditions.

6.6 Sling bins shall always be lifted by appropriate lifting gear only.

6.7 During the deck loading, slings used on the outside wall units to be secured and appropriate precautions taken to ensure slings cannot foul the crane(s).

6.8 Only compatible hooks as prescribed in this Standard shall be used with web slings.

6.9 Sling angles are to be kept to the least possible at all times. Care is to be exercised to ensure that slings used at an angle from the vertical will not slip along the load. Appropriate allowance to be made for the stress due to the sling angle.

6.10 Certified slings may be required to be tested if safety concerns arise. Slings that do not meet the requirements of this standard shall be removed from service. (See Section 5)

6.11 Hooks used for web-sling operations shall:-

1. Have an identifying mark relating to the hooks proof test certificate. Hook certificate shall always be available to the user. The hook certificate shall give all relevant descriptions of the hook test and shall include breaking stress of the prototype, safety factor applied, bar thickness and the radius of curvature.
   
   
2. Be fully radiused in cross section in the web bearing area.
   
   
3.  
4. 1. The lifting surface of the hook shall be a straight bar form and have a diameter of at least 1½".
   2. In lieu of subsection (c)i., slings may be used on hooks of forms other than of a straight bar form provided that they have been specifically matched by manner of use test or are used in accordance with the hook mode factor established for the sling.

6.12 In general, the use of a sling in conjunction with a hook shall be governed by the hooks radius of curvature and bar thickness. These provisions will ensure the prescribed safety factor of a sling is maintained at all stages of a lift.

6.13 Lap joints of cloverleaf slings shall be located at the bottom of the sling clear of the lifting loops and the lifting loops are the be equal in length to within two (2) percent.

7. Repair ^

7.0 Web slings shall not be structurally altered or repaired at this time.

Note: This standard has been drafted based on current experience and methods and the requirements of International Standards whereby structural alteration or repair of web slings is not permitted. This does not preclude the possibility of amending the standard in the future so as to allow structural alterations or repairs should methods evolve that would ensure that slings would retain an acceptable degree of safety after such alterations or repair. Any such alterations or repairs must be at least to the same standards as ordinary used slings in accordance with the Wear Standards.

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