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A FAQ on the subject of quality labelling can be found here.
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GK8 and GK10 lifting are among the most important slings. They are used in a wide variety of applications to lift heavy loads or goods (e.g. in construction or industry).
We can customize the different chain systems for you according to the purpose.
No matter which chain system you choose: the selection of accessories is huge. Different types of hooks, shortening options, suspension links, twist catchers and, and, and … Your individual lifting chain for your special application can be safely put together.
Dolezych will be happy to help you with expert advice. Take advantage of our experience!
Dolezych lifting chains are high-strength, heat-treated chains that are subject to strict quality control in all manufacturing processes. Our chains go through the following quality controls:
For more information, see also Marking of slinging and lifting equipment.
Before putting the selected DoKett lifting chain into operation, check that the identification and dimensions are correct. Never use a DoKett lifting chain that is damaged or whose marking is no longer present!
Always follow good slinging practice: plan the slinging, lifting and lowering operation before you start lifting.
It is essential to observe the angle of inclination ß (angle between the vertical and the sling): The greater the angle of inclination, the lower the load capacity. Angles of inclination exceeding 60° are not permitted!
In the case of 3- and 4-strand DoKett lifting chains and uneven load distribution, the load capacity of a double-strand DoKett lifting chain may only be assumed as a function of the largest angle of inclination. If different angles of inclination occur in the case of two-strand DoKett lifting chains (see figure), only the load capacity of a single strand may be taken as a basis.
!!! Loads can slip or fall if they are attached incorrectly. A falling load can cause serious injury and death !!!!
To avoid overloading of the more heavily loaded strand, only one strand may be assumed to be load-bearing! Uneven load distribution is always to be expected when
– the load is inelastic (e.g.: concrete parts, castings, short beams, etc.),
– the position of the center of gravity is not known,
– the load is unevenly shaped,
– different angles of inclination occur.
Only use suitable and sufficiently dimensioned load application points.
!!! Never reach under lashings! Attention: Do not strike in the hanging aisle !!!!
!!! Warning: Persons at risk include, e.g., slingers and other persons who are in the area of the transport path !!!!
In particular, it is prohibited:
DoKett lifting chains are conveniently stored hanging from racks.
Explanation: Lifting chains of GK8 and GK10 are among the most important lifting gear. They are used in a wide variety of applications to lift heavy loads or goods (e.g. in construction or industry).
Explanation: Stop shortening hooks are always used in conjunction with chain slings. The variably applicable shortening hooks with safety device save components and shorten sling and lashing chains directly in the working area.
You can obtain lifting chains from Dolezych in grades 6, 8, 10 and 12.
Other grades on request.
Please ask your Dolezych team for chain slings for special applications!
The difference between the individual grades of lifting chains is that the load capacity increases with increasing grade while the material thickness remains the same.
The quality class of a chain as well as its components (hooks, connecting links, shorteners, etc.) can be recognised by the quality class marks 8, 10 and 12.
In the tables on the information pages on lifting chains you will often find two angles. These angle values refer to the angle of inclination. The angle of inclination is determined by the degrees between an imaginary vertical straight line and the chain itself. The load capacity of a chain strand changes depending on the respective angle of inclination of a slung load: The greater the angle of inclination, the lower the load capacity. Angles of inclination exceeding 60° are not permitted! If different angles of inclination occur in the case of multiple-strand lifting chains (asymmetrical load distribution), only the load-bearing capacity of the strand with the greatest angle of inclination may be taken as a basis. In individual cases, shortening hooks and compensating rockers can be helpful here.
In contrast to the angle of inclination, the angle of spread measures the angle between two chain strands (maximum 120°).
The useful length L describes the length of a lifting chain plus its fittings, as shown in the following diagram.
The hook openings must always face outwards in order to avoid unintentional unhooking of the load.
Yes, the chain strands that are not under load are hung back in the suspension link/set. In this case, the permissible WLL is reduced to that of a single strand chain.
Factory certificate DIN EN 10204-2.1 and declaration of conformity are automatically included in the scope of delivery. A chain file card is issued in the course of our annual UVV inspection.
Further documents on request.
A lifting chain is always marked with a load capacity tag and by us additionally with a UVV inspection sticker.
Date of next UVV inspection (month/year)
In this case, the lifting chain is downgraded to quality class 2 (DIN 685) and must be inspected promptly by an expert. Use our Dolezych inspection service for this purpose.
In principle, a lifting chain must be inspected by an expert before it is put into operation for the first time. In addition, DGUV 109-017 prescribes regular inspections at intervals of no more than one year by an expert for load handling attachments. However, depending on the conditions of use, tests may be required at intervals shorter than one year. This applies, for example, in the case of particularly frequent use, increased wear, corrosion or heat exposure or if increased susceptibility to faults is to be expected. Round steel link chains used as slings must be subjected to a special inspection for freedom from cracks at intervals of no more than three years (or no more than two years in Austria). We carry out this crack testing with an electromagnetic crack tester in our laboratory or with our test van on your premises.
Are you interested in our testing service? You can find important information here.
No, the use is in accordance with the BG rules and DIN standards are not permitted.
The following table shows the load capacity per grade as a function of temperature.
|GK 6||DoKett stainless steel||100%||75%|
|-20°||-10°||0° to +100°||+150°||+200°||+250°|
The applicable regulations and technical rules for lifting chains can be found in detail in the following works:
If necessary, additional special regulations must be observed, e.g. for the transport of dangerous goods.