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secret that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials
Handling Inc. Copyright 2020 © R&M Materials Handling Inc. All rights reserved.
2.11
Sound Intensity Level
Hoists generate some audible noise during operation. The total noise level experienced in the operating area is a
combination of the individual noise sources around the operator. The main sources of noise from the hoist arise
from its components, vibrating structures and reflective surfaces.
Hoist components which generate noise:
Hoisting machinery
Trolley, bridge or other moving structures associated with the hoist.
Typically, when the operating location is more than 5m from the hoist and associated moving components, the
average combined noise pressure level due to the hoist and its associated components will not exceed 70 dB(A) at
the operating location. The noise pressure level rises as the operator moves closer to the sources of noise.
The noise pressure level can exceed 70 dB(A) if, for example:
The operator operates the hoist from somewhere close to the moving components
The crane or building structures resonate heavily
The walls or other surfaces at the working site reflect noise towards the operator
The optional warning devices are functioning.
If the noise levels seem high, measurements should be taken while the equipment is working under normal
operating conditions. Follow local recommendations and use personal hearing protection if recommended.