On this page you will find frequently asked questions from our customers about chain slings. If you are concerned about a question that is not answered here, please do not hesitate to ask us. We will be happy to answer them by mail.
Grade 8 and
grade 10 chain slings are among the most important slings. They are used in a
wide variety of applications to lift heavy loads or goods (e.g. on construction
sites or in industry).
What are sling
hooks are always used in connection with chain suspensions. The variably usable
shortening hooks with safety device save components and shorten sling and
lashing chains directly in the working area.
What grades does Dolezych have in its product range?
Chain slings are
available from Dolezych in grades 6, 8, 10 and 12.
chain connecting links (grade 6, 8, 10)
clevis system (grade 6, 10, 12)
Please request chain suspensions for special applications from your Dolezych team!
What is the
difference between the individual grades?
between the individual grades of chain slings is that the load capacity
increases with increasing grade while the material thickness remains the same.
How do I
identify the different grades?
The grade of a
chain, as well as its components (hooks, connecting links, shorteners, etc.)
can be recognized by the grade labels 8, 10 and 12.
What is the tilt angle and how is it measured?
The tilt angle
is determined by the degrees between an imaginary vertical line and the chain
itself. The load carrying capacity of a chain sling changes depending on the
respective tilt angle of a suspended load: the greater the tilt angle, the
lower the load capacity. Tilt angles exceeding 60° are not permitted! If different
tilt angles occur with multiple leg chain slings (asymmetrical load
distribution), only the load capacity of the leg with the largest tilt angle
may be used as a basis. In individual cases, shortening hooks and compensating
rockers may be helpful.
What is the spread angle?
In contrast to the tilt angle, the spread angle measures the angle between two chain legs (maximum 120°).
What is the working length of a chain sling?
length L describes the length of a chain sling plus its fitting parts, as shown
in the following diagram.
Why must the hooks always point outwards?
openings must always point outwards to prevent the load from being unhooked
Can I also use a multi-leg chain in a single leg?
unloaded chain legs are hung back into the suspension link/set. In this case
the permissible WLL is reduced to that of a single leg chain.
What documents will I receive when I order a chain sling from Dolezych?
Compliance 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.
How is the chain sling labelled correctly?
A chain sling is
always identified by a load capacity label and by Dolezych additionally with an
UVV inspection plate.
What information can I find on the load capacity tag of the chain?
Load capacity in t for
1-leg smaller than tilt angle 0°
2-/3-/4-legs at a tilt angle of 0°-45° / 45° – 60°
nominal thickness of the chain in mm
date of manufacture (month/year)
Manufacturer’s mark of Dolezych (DD)
What information can I find on the inspection plate?
Date of the next UVV inspection (month/year)
What is the lifting capacity
of the chain sling if the load capacity tag is lost?
In this case, the sling chain is downgraded to grade 2 (DIN 685) and must
be inspected by an expert in due time. Do not hesitate to contact us by mail. We are happy
to answer your questions.
How often must I have my chain slings and associated components checked?
chain sling must be inspected by a qualified person before it is used for the
first time. In addition, DGUV 100-500, item 2.8 prescribes regular inspections
at intervals of no more than one year by an expert for lifting equipment.
Depending on the conditions of use inspections may also be required at shorter
intervals than one year. This applies, for example, in the case of frequent
use, increased wear, corrosion or heat effects or if increased susceptibility
to failure is to be expected. Round steel link chains used as slings must be
subjected to a special inspection for the absence of cracks at intervals of a
maximum of three years (or a maximum of two years in Austria). We carry out
this crack test with an electromagnetic crack testing device in our laboratory
or with our test trolley at your site.
You are interested in our inspection service? Do not hesitate to contact us
When is a chain sling out of service?
deformations of a chain link
Decrease of the
averaged link thickness at any point by more than 10% of the nominal thickness
the outer nominal dimension L by more than 3% (or an inner elongation of 5%)
Expansion of the
hook mouth by more than 10% or other deformations
Wear of the hook
bottom by more than 5%
Wear of the
suspension and end links (material thickness in mm) by more than 10%
illegible identification tag (reduce load capacity according to quality class
Discoloration due to heat influence
May chain slings be used in pickling plants and hot-dip galvanizing plants?
No, the use is not permitted according to the BG rules and DIN standards.
At what temperatures may the chain slings be used?
The following table shows the load carrying capacity per grade in relation
Which regulations are fundamental for the use of chain slings?
The applicable regulations and technical rules for chain slings can be read
in detail in the following works:
Chains slings grade 8 / 10 / 12 DIN EN 818-2 / DIN EN 818-4 / PAS 1061
Chain slings grade 6 (stainless steel) similar to DIN 5688-1
DIN 685 Part 5 Tested round steel chains, manual
DIN EN 818-6 Chain slings, Instructions for use and maintenance
DGUV 109-004 Safety regulations for round steel chains as slings in hot-dip galvanizing plants
DGUV 100-500, section 2.8 Load suspension devices in hoist operation
DGUV 209-013 Safety training letter for security guards
2006-42-EC-Directive for machines and their supplements
DIN EN 1677-1-4 Components for slings – Safety
Special regulations beyond this must be observed, e.g. for the transport of dangerous goods. For American Standards, please see ASME B30.9.