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Building Design and Construction Handbook - Merritt - Ventech!

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17.68 SECTION SEVENTEEN<br />

or three-shift construction work <strong>and</strong> delaying work that requires overtime. Also,<br />

some Federal agencies have promulgated regulations requiring noise readings on<br />

projects (Table 17.2). In accordance with such readings, local officials may place<br />

a construction project in one of the following categories:<br />

Unacceptable: Noise levels exceed 80 dB for 1 h or more per 24 h, or 75 dB<br />

for 8 h per 24 h.<br />

Normally unacceptable (discretionary): Noise exceeds 65 dB for 8 h per 24 h<br />

or loud repetitive noises on site.<br />

Normally acceptable (discretionary): Noise does not exceed 65 dB for more than<br />

30 min per 24 h.<br />

Acceptable: Noise does not exceed 45 dB for more than 30 min per 24 h.<br />

Energy conservation in construction projects is part of the overall problem of<br />

the conservation of energy resources of the nation as a whole. Contractors should<br />

be alert to <strong>and</strong> aware of any ways to bring this about. They can help by using<br />

TABLE 17.2 Limits on Noise Levels of<br />

<strong>Construction</strong> Equipment<br />

Equipment<br />

Earthmoving<br />

Maximum<br />

noise level at<br />

50 ft, dB(A)<br />

Front loader 75<br />

Backhoes 75<br />

Dozers 75<br />

Tractors 75<br />

Scrapers 80<br />

Graders 75<br />

Trucks 75<br />

Pavers<br />

Materials h<strong>and</strong>ling<br />

80<br />

Concrete mixers 75<br />

Concrete pumps 75<br />

Cranes 75<br />

Derricks<br />

Stationary<br />

75<br />

Pumps 75<br />

Generators 75<br />

Compressors<br />

Impact<br />

75<br />

Pile drivers 95<br />

Jackhammers 75<br />

Rock drills 80<br />

Pneumatic tools<br />

Other<br />

80<br />

Saws 75<br />

Vibrators 75

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