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Definition of FL_U and FL_P

In addition to the most common installation types unsupported (FL_G), unsupported with sag (FL_B) and gliding, there are others that have a few special features. Here we introduce you to two additional installation types: the projected unsupported length FL_P and the unsupported lower run FL_U.

Unsupported lower run FL_U

What does unsupported lower run mean?

One speaks of an unsupported lower run FL_U as soon as part of the lower run of the energy chains is not supported. This type of installation enables a compact design in which the range of the work area comes as close as possible to the footprint of the machine - thus saving space.

Our recommendation: For short strokes of up to 2m, it can be an attractive alternative to create more space while maintaining the same machine dimensions.

Unsupported lower run FLU

Special features of the unsupported lower run

1. At least the first three chain links of the lower run should be supported to reduce the force on the mounting bracket.

2. Supported chain links do not count as part of the FL_U area.

3. The maximum unsupported length of the lower run is approximately 1/3 less than the unsupported length FL_G.

4. The maximum speed and acceleration data are the same as for the unsupported length with sag FL_B.

Tests conducted in the test laboratory

Through extensive testing, it is possible to determine the fill weight of the most common energy chain series E4.1, E4Q or E2/000.

Unsupported lower run FLU

Unsupported lower run FLU

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Projected unsupported length FL_P

Projected unsupported length FLP

What does projected unsupported length mean?

In some applications, the energy chains are often used with an inclined working distance. The projected unsupported length FL_P installation type is often used in construction machinery or work platforms.

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