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3.2.1 Model
EXE-Rise Chain hoist models are based on a German standard that differentiates between three types of
electric chain hoists:
D8 Hoist
Electric chain hoist according to DGUV 115 (formerly known as BGV D8) "Winches, lifting and pulling
devices") for use as a chain hoist for lifting loads in construction.
D8 Plus Hoist
Electric chain hoist based on DGUV 115 "Winches, lifting and pulling devices" for use as a chain hoist for
lifting loads in construction with the special characteristic of being able to hold loads statically above people
without the use of secondary safety devices. The types of electric chain hoists specified above can be
operated both individually and in groups. The choice of the type of electric chain hoist depends on the
operating conditions:
D8
D8
with
secondary safety device
D8 Plus**
With people under the load
Holding loads
not permitted
permitted
permitted
Erection /dismantling,
rigging operations
not permitted
not permitted
not permitted
Scenic movement
not permitted
not permitted
not permitted
Complex scenic
movement
not permitted
not permitted
not permitted
Table 5 “Selection criteria for electric chain hoists for moving and holding loads above people”
Local legislation shall be checked for specific regulations. For guidance we refer to the German regulation
DGUV 17 (formerly known as BGV) The user could refer to German SQ-P2 code-of-practice for information,
which can be obtained at
www.igww.org
* Source: IGVW SQ P2
– Electric chain hoists
** For statically indeterminate loads, Load cells shall be used in combination with hoist control. The lifting operation shall be stopped in
the event of exceeding the pre-set over- or underload
– limits. Values shall be derived from structural analysis of the applied loads
3.2.2 Type of Control
Selection of the hoist also depends on the duty class needed. The duty class refers to the time the hoist can
operate under full load. EXE-Rise chain hoists have a minimum rating of 1Bm and maximum rating of 2m as
per FEM classification; See table 6.
Class
1Bm
1Am
2m
3m
Duty factor of motor
25%
30%
40%
50%
Starts per hour
150
180
240
300
Table 6 “FEM Classification”
Depending on its operating hours and the load applied the same hoist can also be used in another duty
class. Please contact RWM for support if this is required.
Table 7
gives guidance for correct selection
