R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 8)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
8/130
R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
3 Safe operation
3.1 Intended use of the hoist and ambient conditions
The hoist is intended for lifting and moving goods. The hoist may not be used for lifting and moving
people. The hoist is intended for indoor use or for use in outdoor premises when specially equipped for
the purpose. The ambient temperature should be -10 ... +40ºC (14…104ºF), with explosive proof hoists -
20 ... +40ºC (14…104ºF), or, if specially equipped, -20 ... +50ºC (-4…122ºF). The relative humidity of the
ambient should be less than 90%. If the hoist is used in exceptional ambient conditions (such as in a
windy area, a corrosive atmosphere or in an area prone to earthquakes) or is used to handle dangerous
materials (such as molten metal), any need for special equipment must be determined with the
manufacturer or the manufacturer's representative.
3.2 Sound intensity level
The sound intensity level of the hoist in an operating location will not exceed 70dB (A).
3.3 Service classification of hoist
Safe and effective operation of the hoist is dependent on correct classification of the hoist's operating
group. According to FEM9.511 standard the hoist's operating group can be determined from its:
- load spectrum
- average daily operating time
3.3.1 Load spectrum
The load spectrum can be determined from the table below.
LIGHT
Occasional full load.
Usually light load.
Small fixed load.
MEDIUM
Occasional full load.
Usually light load.
Average fixed load.
HEAVY
Repetitive full load.
Usually average load.
Heavy fixed load.
VERY HEAVY
Usually almost full load.
Very heavy fixed load.
Load %
Operating time %
Load %
Operating time %
Load %
Operating time %
Load %
Operating time %
3.3.2 Average daily operating time
The average daily operating time of the hoist can be calculated from the running time of the hoisting
machinery [hours/day].
60
2
∗
∗ ∗ ∗
=
V
T N H
t
H = average hoisting height [m]
N = number of work cycles per hour [cycles/h]
T = daily working time [h]
V = hoisting speed [m/min]