Milnor 30015T5E Installationshandbuch PDF herunterladen (Seite 10)

Chapter 1. Commissioning

PELLERIN MILNOR CORPORATION

Estimates of the maximum force normally encountered are available for each Milnor

model

and size upon request. Floor or foundation sizes shown on any Milnor

document are only for

on-grade situations based only on previous experience without implying any warranty, obligation,

or responsibility on our part.

1.2.1.

Foundation Considerations

Size for size, rigid washer-extractors naturally require a stronger, more rigid floor,

foundation, or other supporting structure than flexibly-mounted models. If the supporting soil

under the slab is itself strong and rigid enough and has not subsided to leave the floor slab

suspended without support, on grade installations can often be made directly to an existing floor

slab if it has enough strength and rigidity to safely withstand our published forces without

transmitting undue vibration. If the subsoil has subsided, or if the floor slab itself has insufficient

strength and rigidity, a deeper foundation, poured as to become monolithic with the floor slab,

may be required. Support pilings may even be required if the subsoil itself is “springy” (i.e., if its

resonant frequency is near the operating speed of the machine). Above-grade installations of rigid

machines also require a sufficiently strong and rigid floor or other supporting structure as

described below.

1.2.2.

How Strong and Rigid?

Many building codes in the U.S.A. specify that laundry floors must have a minimum live

load capacity of 150 pounds per square foot (732 kilograms per square meter). However, even

compliance with this or any other standard does not necessarily guarantee sufficient rigidity. In

any event, it is the sole responsibility of the owner/user to assure that the floor and/or any other

supporting structure exceeds not only all applicable building codes, but also that the floor and/or

any other supporting structure for each washer-extractor or group of washer-extractors actually

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.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 49 50

Keine Kommentare

Milnor 30015T5E Installationshandbuch Seite 10