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NS-EN 474-1 :2006+A3:2013
EN 474-1:2006+A3:2013 (E)
E.S Additional requirements for attachable hooks used as lifting device(s)
E.5.1 Safety latch
Attachable hooks shall be provided with a safety latch, unless unintentional displacement of the sling or load
from the hook is prevented by other construction means (see Figure E.3). Damage of the safety latch due to
disadvantageous location of the hook shall be avoided. If a safety latch is used it shall meet the requirements
of 5.6 of EN 1677-2:2000.
Key
1 safety latch
Figure E.3-
Safety latch
E.5.2 Design and strength
E.5.2.1 Attachable hooks
The attachable hook shall be designed
15>
and tested
(5I
to withstand at the different positions of the
attachment (working tool) or equipment the kind of stresses described below:
4 times of the RLL at direction of the vertical load (see Figure E.4.a), a deformation is acceptable, but the """"'
load shall remain supported;
2,5 times of the RLL perpendicular to the direction of the vertical load (see Figure EA. b), a deformation is
acceptable, but the load shall remain supported;
1,5 times of the RLL side-load (see Figure E.4.c) without visible deformations after completion of the test.
:1:::
E.5.2.2 Bolted hooks
For a bolted attachable hook the:
bolt dimensions;
bolt quality (e.g. 8.8);
holes at the intermediate plate and the
distance of the bore holes
(f)
shall be so designed that the requirements according to E.5.2.1 can be fulfilled.
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