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User Instructions
Should you find your equipment is no longer of use,
please dispose of in a responsible manner. Please
contact Modulift if you need further guidance
© Copyright 2017 Modulift.
All rights reserved.
MOD CLS
WARNING!
●
●
Never exceed the top or bottom clamp WLL
(see MOD CLS Specification).
●
●
Always remember to consider the weight of the lifting
beam when checking the complete lifting arrangement.
●
●
For loads with an offset CoG, the clamp closest to the CoG
will have the highest loading. Remember the loading on
each clamp will not be equally distributed.
●
●
Your lifting beam configuration will always depend on the
number of lifting points required, as well as the stability and
CoG position of the load.
●
●
For indeterminate lifts (i.e. more than
2 bottom
lifting
clamps), always allow for the worst possible unequal load
distribution on each clamp.
●
●
The MOD CLS is designed for a specific purpose and must
not be used outside the limits stated within this document.
●
●
The MOD CLS beam clamps must not be used in combination
with any other unauthorised equipment, either as individual
components or as part of a third-party system.
●
●
If your lifting configuration is not shown in the below
examples, or if you are in any doubt, please contact Modulift.
More than 2 bottom clamps
It is possible to use more than 2 bottom clamps underneath the
beam for lifting loads with multiple lifting points. Please also
note that for indeterminate lifts, it is much more likely for the
load to be unequally distributed between each bottom clamp.
If the load is not equally distributed between each bottom
clamp, always ensure the unequal loading does not exceed
each bottom clamp WLL. Also ensure that the total load does
not exceed the two top clamps WLL and beam WLL (as shown
in
Table 3
). Always fit at least one
red safety stop
to each
clamp and tighten bolt to a torque of 30 lbf.ft prior to any lift.
Using
Table 3
for more than 2 bottom clamps (i.e. for lifting
arrangements equivalent to
Fig. 7a
and
Fig. 7b
below), the
worst-case load regarding the bottom span B shall be used
when checking the beam SWL value.
Red safety stops
are
shown in three possible arrangements, depending on clamp
position and lifting beam hole location.
Load offset CoG vs tilt
In order to prevent tilt for lifting configurations with an offset
CoG, the CoG of the load must sit vertically under the crane
hook. For the beam not to tilt when lifted unloaded, the centre
of the beam needs to sit vertically under the crane hook. To
avoid the load and the beam (either loaded or unloaded) from
tilting, always ensure the top lugs are equally spaced from the
centre of the beam. Adjust the location of the bottom clamps
so that
both
the CoG of the load and the CoG of the beam sits
vertically under the hook (as shown in
Fig. 8
and
Fig. 9
below).
Please note for a lifting beam configuration (
Fig. 8
single top
lug), if it is not possible to fit a
red safety stop
between the top
clamp collar plates (as shown), fit two
red safety stops
to the
nearest beam hole on either side of the top clamp.
The following two pages are intended
to provide clear instruction for correct
usage of the MOD CLS in other common
lifting scenarios. If your lifting configuration
is not shown, or if you are in any doubt,
contact Modulift for further assistance
For offset CoG loads, the clamp closest to the CoG will be
loaded higher. As loads on the clamps will not be equally
distributed, always ensure the unequal loading does not
exceed each bottom clamp WLL.
Note:
If the Beam section is not long enough and the bottom
clamps cannot be moved further to accommodate the CoG
offset, then to accommodate the offset CoG of the load –
please adjust the top clamp position.
Always ensure that
all lug plates are being pulled vertically or towards the
body of the clamp
(loaded or unloaded) as shown in
Fig.10a
.
Increasing the height of the top slings will reduce the tilt.
Never allow the beam to tilt more than 6 degrees from
the horizontal plane.
MOD CLS
MOD CLS US JULY 2017
Fig. 8 – Lifting beam
(single top lug) and
load with offset CoG
Fig. 9: Semi-Spreader
(two top lugs) and
load with offset CoG
B
1
B
2
Fig. 7b – Using B
1
and B
2
the lowest
SWL shall be applied
B
1
B
2
= 0
Fig. 7a – Using B
1
and B
2
the lowest SWL shall
be applied
Modulift UK Ltd
tel:
011 44 1202 621511
email:
sales@modulift.com
www.modulift.com
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