Field-Assembled Cooling Towers

with the following requirements:

a.

Type I, Induced Mechanical Draft.

b.

Constructed of [zinc-coated steel] [stainless steel] [wood]

[fiberglass-reinforced plastic]. No asbestos-cement materials

will be permitted.

c.

Hardware shall be [cadmium plated] [zinc-coated] [stainless steel]

except nails shall be [silicon bronze] [commercial bronze]

[stainless steel].

d.

Vibration cutout switch shall be provided and interlocked with the

fan motor.

e.

Fill or contact surfaces shall be [polyvinyl chloride (PVC) formed

sheets] [zinc-coated steel] [wood]. No plasticized cellulose

materials will be permitted.

f.

Field performance test is not required.

[g.

Fifteen-percent increase in design structural loading shall be

included for ice or snow load.]

[h.

Air inlet and discharge terminations shall have flanged or lipped

projections for connecting ductwork.]

[i.

Fan motor shall be 2-speed.]

2.7.5

Field-Assembled Cooling Towers

Induced-draft, counterflow or crossflow type, and either spray-filled or

wetted-surface type. Field-assembled towers shall include those where a

majority of assembly work is done at the project location.

2.7.5.1

Sound Power Levels

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NOTE: Choose one of the following options.

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NOTE: Specify sound power levels after considering

location and application of cooling tower. Delete

first paragraph if project includes Section 15070,

"Mechanical Sound, Vibration, and Seismic Control."

Delete second paragraph if project does not include

Section 15070, "Mechanical Sound, Vibration, and

Seismic Control."

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[Sound power levels (in decibels with a reference pressure of 0.0002

microbar) of the cooling tower shall not exceed the maximum permitted

decibel levels for the designated octave band as set forth in the following

tables. Base the sound power level data for the cooling tower on tests

conducted in accordance with ANSI S1.13.

Octave Band

(in Hz)

63

125

250

500

1000

2000

4000

8000

SECTION 15601N

Page 31