has sufficient strength and rigidity, plus a reasonable factor of safety for both, to support the
weight of all the fully loaded machine(s) including the weight of the water and goods, and
including the published 360º rotating sinusoidal RMS forces that are transmitted by the
machine(s). Moreover, the floor, foundation, or other supporting structure must have sufficient
rigidity (i.e., a natural or resonant frequency many times greater than the machine speed with a
reasonable factor of safety); otherwise, the mentioned 360º rotating sinusoidal RMS forces can be
multiplied and magnified many times. It is especially important to consider all potential vibration
problems that might occur due to all possible combinations of forcing frequencies (rotating
speeds) of the machine(s) compared to the natural frequencies of the floor and/or any other
supporting structure(s). A qualified soil and/or structural engineer must be engaged for this
purpose.
Figure 1: How Rotating Forces Act on the Foundation
Typical Machine
Legend
A.
Direction of force
B.
Load
C.
Rotation (Frequency = RPM / 60)
Figure 1 above is intended to depict both on-grade and above-grade installations and is
equally applicable to flexibly-mounted washer-extractors, as well as to rigid models installed
either directly on a floor slab or on a foundation poured integrally with the slab. Current machine
data is available from Milnor
®
upon request. All data is subject to change without notice and may
have changed since last printed. It is the sole responsibility of every potential owner to obtain
written confirmation that any data furnished by Milnor
®
applies for the model(s) and serial
number(s) of the specific machines.
— End of BIWUUI02 —
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