Instructions for use of lifting slings
It is important to follow the instructions for use of the slings in order to secure the lifting operation and to maximize the life of the equipment.
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How to choose the right sling?
As explained above, choosing your sling starts with calculating the weight of the load to be lifted and determining the appropriate mode factor.
Before use, visually inspect the slings to detect any damage. Any damaged sling should be scrapped.
' Make sure they have no defects,
' Ensure that their identification and specifications are correct via the traceability label or the marking plate.
In the case of combined use of a sling with fittings and/or lifting devices, ensure that these elements correspond to each other.
How to properly carry out its slinging?
Only entrust the slings to competent personnel (trained and experienced).
Slings should be placed over the load so that the load is evenly distributed across their width.
The sling must be fixed in such a way that the load cannot fall during lifting. Position the sling so that the lifting point is directly above the center of gravity and so that the load is balanced and stable.
Avoid damaging labels or marking plates by ensuring that they are not in contact with the load.
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In case of lifting with several slings, respect the angles at the top indicated in the tables for multiple slinging.
Only tie webbings or slings together with suitable metal buckles or rings.
When lifting in basket (U) configuration, check that the load is well secured, because with this lifting method it is not immobilized as during tie lifting. When using slings in pairs, it is recommended to use a lifting beam.
Assembly links and other connection systems: check the correct positioning of their constituent elements (half-links, pin, locking system, ring or pin). Check the correct locking of these elements.
Things not to do
It is important to avoid certain actions to preserve the sling and everyone's safety:
- Avoid any impact or sudden handling of loads
- Avoid shock when tensioning the sling
- Load slowly to check equilibrium conditions
- Never drag a load in the sling and never leave a sling on the ground
- Avoid jamming the sling and do not try to pull it to free it
- Do not leave the load on the sling
- Never stand under the load, never leave a suspended load unattended
- Any technical intervention on the slings, such as heat or surface treatment, grinding, welding, is prohibited.
- Never place the seams of the textile slings on the hooks or other lifting device: always ensure that the seam is located in the vertical or almost vertical part of the sling
- Never twist a sling and never load a sling that has knots
- Never load the hooks on their tips, the load must be centered on the component in such a way as to allow it to 'self-center'
- Our multi-leg slings are calculated at 45° in A with respect to the vertical (see sling identification plate). If used at a higher angle, reduce the CMU according to the instructions in the table. Never exceed the WLL of the sling, even if the sling angle is reduced
Practice Proper Rigging Equipment Care & Storage
Proper care and storage are essential for maximum service life and safety of rigging equipment. How the equipment is handled and cared for has a big impact not only on your safety, but that of your coworker. Outside of the daily inspections, care and storage is one of the easiest means of protecting and preserving the investment in our rigging equipment. Personnel using rigging equipment shall ensure that they are cared for and stored properly by practicing the following suggestions:
- Slings, shackles and clamps should be stored on racks (preferably vertical) and in designated locations when not in use
- When synthetic slings are not in use, store them in a dark, cool, dry location, free from mechanical and environmental damage
- Before storage, and periodically during storage, wipe slings clean to remove as much dirt and abrasive grit as possible
- Lubricate wire rope slings to extend their useful life
- Do not store the equipment in a location where it will be subjected to mechanical damage, corrosive action, moisture, extreme heat, or kinking
- Do not store synthetic-web slings where the temperature exceeds 200 degrees F (93 degrees C)
- Do not store synthetic-web slings outside in the open where UV exposure can damage the sling
- UV exposure can reduce the sling's Working Load Limit (WLL) by up to 50 percent
- Dropping slings in the dirt allows more corrosive sand and grit to accumulate and wear on the equipment
- Dirty synthetic slings make it harder to inspect them to ensure they are in good working order prior to lifting a load
- Dropping rigging equipment on concrete prematurely wears the slings, shackles, and clamps
- The concrete is hard and abrasive, and will easily wear the edges of chains
- Dropping shackles on the concrete can wear the embossing off and require the item be removed from service if the WLL is not visible
- Rigging equipment dumped on the floor makes it subject to wear or damage from foot traffic, forklifts, raw materials, grinder spray, and weld spatter
- Slings dumped on the floor can result in damaged tags that could require removal from service
- Chain slings can be retagged, synthetic slings cannot if the tags are ripped and unreadable, or removed from mishandling
- Avoid getting them wet, if possible
- If the conditions of the lift are wet, let the synthetic slings dry out after use by hanging them to air dry
- Nylon based slings, when wet, lose approximately 15 percent of their WLL
- This strength returns when the sling dries completely
- Do not lift with round slings that have been allowed to get wet and then frozen
- The ice crystals become like knives on the cords when a load is applied to a frozen round sling and will cut them and prematurely shorten its life
Rigging equipment is your lifeline to hoisting and moving loads safely. Treat it as a tool that needs to be kept in top working condition to protect your health and your coworkers.
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Remember, safety is built one step at a time!