WLL stands for Working Load Limit, while SWL stands for Safe Working Load. The term “WLL” is still in use, whereas SWL is not. WLL is alternatively known as the Optimum Load Limit, while SWL is alternatively known as the Normal Working Limit.
Should SWL be replaced by WLL?
SWL has been phased out and should no longer be used, and all reasonable practicable efforts should be made to replace SWL with WLL. MRC should be used for all machines that operate with variable jib lengths e.g cranes, telehandlers, hoists and winches etc.
What is SWL and SWL?
SWL – Safe Working Load: This is a number you will rarely find marked on any equipment. It is a number derived from a formula worked out by a competent person based on the Minimum Breaking Strength of the item. The standard formula is currently 10% of the MBS for items of fabric (tape slings, ropes, etc.) and 20% of the MBS for items of metal.
What is the difference between WLL and SWL of sling chains?
WLL is the working load limit which is the maximum load which an accessory can by design lift. SWL safe working load is the load that can be lifted under particular service conditions. The SWL of sling chains depends on the included angle.
What does WLL mean in rigging?
A simple definition of WLL is the maximum load that includes mass or force that should ever be applied to the load carrying equipment in a specified condition or application. Any rigging device or configuration is only as strong as its weakest or lowest WLL rated part.
What is the difference between WLL and SWL?
WLL vs SWL “WLL” stands for “working load limit” while “SWL” stands for “safe working load.” The main differences between safe working load from working load limit is that “SWL” is the older term. Today, SWL is not used anymore because it has been completely replaced by the term WLL.
When did WLL replace SWL?
Around 2000, both the Americans and Europeans have agreed that Working Load Limit (WLL) should replace Safe Working Load (SWL) in describing the capacity of items such as hooks, slings and shackles etc. Other Standards detail the requirements for cranes, hoists and winches.
What is WLL in crane?
Working Load Limit (WLL) is the maximum working load designed by the manufacturer. This load represents a force that is much less than that required to make the lifting equipment fail or yield. The WLL is calculated by dividing MBL by a safety factor (SF).
What is WLL for lifting?
WLL – Working Load Limit: This is the number marked on a piece of equipment indicating the maximum load that is safe to apply to it. It is a number established by the manufacturer of the item based on its known Minimum Breaking Strength (MBS) to which they will then factor in a margin of safety to get the final number.
How do you calculate WLL?
Other synonyms include Working Load Limit (WLL), which is the maximum working load designed by the manufacturer. This load represents a force that is much less than that required to make the lifting equipment fail or yield, also known as the SWL the WLL is calculated by dividing MBL by a safety factor (SF).
What does WWL stand for in lifting?
WWL stands for Working Load Limit. The WLL is the maximum authorized load that can be borne when working with a device.
What is SWL WLL MBS?
SWL — Safe Working Load. NWL — Normal Working Load. WLL — Working Load Limit (Current term used) Other Acronyms. MBS — Minimum Breaking Strength.
What is SWL in crane?
SWL is defined as the maximum safe load that the lifting equipment can lift, move, suspend, and lower down to the ground without any problem of breaking.
How is crane SWL calculated?
Once you know the diameter of the rope, you can apply it to the formula, which is SWL = D2 x 8. D represents the diameter of the rope in inches. If you're working with a 1.5-inch diameter cable, for example, then the formula would be SWL = 1.52 x 8 or SWL = 2.25 x 8.
How do you calculate SWL of wire rope?
The way to determine the SWL is by squaring the diameter of the rope and multiplying it by 8 kgs. Thankfully, most wire rope distributors will present this calculation for you. The safe working load will change depending on the diameter of the wire rope and its weight per foot.
What is the difference between WLL and SWL?
The main difference between the two terms is that SWL is the older term . Today, SWL isn't used anymore because the term is completely replaced with WLL and MRC.
What does MRC stand for in SWL?
Today, SWL isn't used anymore because the term is completely replaced with WLL and MRC. MRC stands for Maximum Rated Capacity. For more information on the topic of Working Load Limit you can download the document here.
What is a SWL?
Safe Working Load (SWL) sometimes stated as the Normal Working Load (NWL) is the mass or force that a piece of lifting equipment, lifting device or accessory can safely use to lift, suspend, or lower a mass without fear of breaking. About 20 years ago, the USA ceased using this term, because of legal implications and the European ...
What is SWL in engineering?
The term Safe Working Load , (SWL) has been the cornerstone of engineering, particularly with respect to load carrying equipment, for many years. It was generally considered to be the minimum breaking load of a component divided by an appropriate factor of safety giving a ‘safe’ load that could be lifted or be carried.
What is a SWL crane?
In Australia the use of Safe Working Load (SWL) for cranes, hoists and winches was universally used throughout all industries and referenced in legislation and the Australian Standards. The Wikipedia definition of SWL is: Safe Working Load (SWL) sometimes stated as the Normal Working Load (NWL) is the mass or force that a piece ...
Is a single leg sling a WLL?
For example, the WLL of a single leg wire rope or chain sling in a straight pull or lift is the WLL specified by the manufacturer, however if a two leg sling consisting of two single legs is used, then the WLL is reduced depending on the included angle between the slings. The WLL is only as good as its weakest, or lowest WLL components.
What is SWL in engineering?
The term safe working load ( SWL) has been the cornerstone of engineering, particularly with regard to load carrying equipment, for many years. It was generally considered to be the minimum breaking load of a component divided by an appropriate factor of safety giving a ‘safe’ load that could be lifted or be carried.
What is WLL in a chain sling?
For example, the WLL of a single leg wire rope or chain sling in a straight pull or lift is the WLL specified by the manufacturer, however if a two leg sling consisting of two single legs is used, then the WLL is reduced depending on the included angle between the slings.
What is SWL in cranes?
In Australia the use of Safe Working Load ( SWL) for cranes, hoists and winches was universally used throughout all industries and referenced in legislation and the Australian Standards. The Wikipedia definition of SWL is: Safe Working Load (SWL) sometimes stated as the Normal Working Load (NWL) is the mass or force that a piece ...
What is a WLL?
A simple definition of WLL is the maximum load that includes mass or force that should ever be applied to the load carrying equipment in a specified condition or application. Any rigging device or configuration is only as strong as its weakest or lowest WLL rated part.
What is SWL in engineering?
The term Safe Working Load, (SWL) has been a term used by the engineering fraternity particularly with respect to load carrying equipment for many years. It was generally considered to be the minimum breaking load of a component divided by an appropriate factor of safety giving a ‘safe’ load that can be carried or lifted.
What is WLL used for?
WLL should be used for all lifting devices. Allowance must be taken into consideration for the arrangement of the lifting devices by derating the WLL. Important note: WLL embossed on equipment. To make it more difficult, what you see is not what you think you are getting.
What is SWL in cranes?
Throughout the world the use of Safe Working Load (SWL) for cranes, hoists, winches and lifting gear was universally used throughout industries and referenced in the relevant legislation and standards. Since the definition of “Safe Working Load” is not very specific and there are legal implications, the USA standards stopped using this term.
Is safe working load legal?
Since the definition of “Safe Working Load” is not very specific and there are legal implications, the USA standards stopped using this term. A few years later the European and ISO standards began to follow suit. The Americans, Europeans and ISO then developed a more appropriate term and definition for the maximum load capacity ...
Is SWL replaced by WLL?
SWL has been phased out and should no longer be used, and all reasonable practicable efforts should be made to replace SWL with WLL. MRC should be used for all machines that operate with variable jib lengths e.g cranes, telehandlers, hoists and winches etc. The MRC must be clearly labelled on both sides of the lifting machine.
