80
6 - L
OAD
C
APACITIES
Load Capacities
WARNING
To ensure safety at all times on a mast climbing work platform system, bridges should not be
loaded beyond their maximum rated weight capacities. In addition, to prevent a mast climbing
work platform system from stalling because of an overload, maximum rated load capacities of
the motorized unit(s) should be observed. Overloading a mast climbing work platform system
could result in serious injury or death.
Make sure that there is never two workers standing on the same plank outrigger at the same time.
Changes to the calculation method of load capacities
It is important to note
that in versions
prior to version 4.0
of the M2 Series owner’s
manual, the load allowed to be placed on a bridge or a unit was as shown in the load
capacities charts: users did not have to take into account the weight of planks or the weight
of workers (including their personal tools) on the setup, except for the number of workers.
The interpretation of the M2 Series load capacities diagrams has been modifi ed in order
to standardize the method used for all Hydro Mobile series.
For point load confi gurations, contact the Hydro Mobile technical support team.
Load capacity calculation guidelines
1-
The weight of planks and any additional accessory being used must be deducted
from the load capacities.
2-
Each worker’s weight (personal tools and equipment included) must be deducted
from load capacities.
3-
To ensure stability in a single unit modular setup, the length of cantilever bridges on
either side of the unit must be equal at all times, with the exception of the setup shown
in the single unit capacity chart for 24' (7,3 m) units. It is also recommended that the
loads applied on the platform be as evenly distributed as possible.
4-
To ensure stability in a multiple unit modular setup, the minimum load applied on the
bearing bridge must be similar to the total load applied on the cantilever bridges.
5-
It is recommended that there be a
maximum
number of workers for each installation,
calculated as follows: overall length of installation divided by 7' (2,1 m) and rounded
up,
PLUS
two workers for each motorized unit in the installation, with at least one of
those two workers being a qualifi ed user/operator for an M2 Series motorized unit
and its accessories. For example, on a setup with an overall length of 108' (32,9 m),
the calculation would be: 108' / 7' (or 32,9 m / 2,1 m) rounded up to
16
,
PLUS
two
workers
for
each
motorized unit (in this case, two units) =
4
, resulting in a
maximum of
20
workers
for the installation, including
two qualifi ed users/operators
. Refer to
p. 5 of the
Performance and Safety Rules
section for the defi nition of a qualifi ed
user/operator.
6-
The weight of each person working in a given area reduces the load capacity of that
area.
7-
The load capacities charts stickers displayed on the motorized unit used in the
setup will take precedence over the information included in this owner’s manual.
8-
The load capacity for the unit is shown in the green box on the same line as the cantilever
bridge chosen, both on single and multiple unit setups load capacity charts.
9-
Multiple unit setups can be a combination of any cantilever bridge on one side with any
bearing bridge shown on the charts. Exclusions are shown in red in the charts (see
fi g. 6.3, p. 82 and fi g. 6.4, p. 83).
10-
To calculate the load capacity of a standard, authorized multiple unit confi guration that
is not shown in the charts included in this manual, take the length of the bearing bridge
to be installed and refer to the capacities of the bearing bridge in the chart that is longer and
closest to it. For example, for a 48' (15 m) bearing bridge, the load capacities and
positioning of a 52' (16 m) bearing bridge would be used.
The load capacities charts included in this owner’s manual apply to installations using
modular bridges or old-style bridges, as well as a combination of both.
LEGEND
10’ (3 m) modular bridge assembly
Length of bridge setup
5’ (1,5 m) modular bridge assembly
6’ (1,8 m) bearing bridge
adapter
Motorized unit
