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There are a number of mast types:
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SIMPLEX:
The features of a simplex mast are:
- Single stage mast.
- Limited Free Lift (4-6") Free lift is the distance the forks go up before the mast is extended.
- Recommended Use: In loading and unloading trucks and in
areas where overhead clearance
is a problem.
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DUPLEX:
The features of a duplex mast are:
- Two stage mast.
- Has greater Free Lift (50-60") than the simplex mast.
- Can load and unload higher-tiered
stacks than simplex.
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Figure 2. Triplex mast in narrow aisle rider reach truck. Note that the forklift is removing stock from a rack. Foot and truck traffic in the opposite
aisle way should be controlled to prevent injury from falling materials. |
TRIPLEX:
The features of a triplex mast are:
- Three stage mast.
- Has same Free Lift (50-60") as duplex mast but extends further.
- Can load and unload higher-tiered
stacks than simplex or duplex.
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QUAD:
The features of a quad mast are:
- Four stage mast.
- Has same Free Lift (50-60") as duplex or triplex mast but extends further.
- Can load and unload higher-tiered
stocks than the duplex or triplex, but requires precautions at its highest lifting heights.
Note: The lifting capacity of the forklift decreases as
its load is raised.
For more information, see
Load Handling
and
Narrow Aisles.
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