construction noise

8/12/2019 Construction Noise

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ENVIRONMENTAL PROTECTION AND

MANAGEMENT

(CONTROL OF NOISE AT CONSTRUCTION

SITES) REGULATIONS

2. Construction site any premises

(a) erection, construction, alteration, repair

or maintenance of buildings, structures orroads;

(b) the breaking up, opening or boring underany road or adjacent land in connection with

the construction, inspection, maintenance orremoval of works;

(c) piling, demolition or dredging works; or

(d) any other work of engineering

construction.


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Permissible noise level

After 1st Oct 2007, maximum permissible noiselevels set out in second schedule.

Noise measurement taken at one meter awayfrom the outside of any affected building.


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MAXIMUM PERMISSIBLE NOISE LEVELS

Types of affected buildings Maximum permissible noise

level for construction sites

(reckoned as equivalent over

12 hours in dB(A))

7 am to 7 pm 7 pm to 7 am

(a) Hospitals, schools 60 50

(b) Residential buildings located 75 -

less than 150 m from construction

Site

(c) Buildings (other than above) 75 65


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Maximum permissible levels Leq, 5 min

Types of buildings Max permissible levels Leq, 5 min

7 am to 7 pm 7 pm to 10 pm 10 pm to 7 am

(a) Hospitals, schools 75 55 55

(b) Residential buildings

less than 150 m(i) On Mondays to Saturdays 90 70 55

(ii) On Sundays and PH 75 55 55


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PROHIBITED PERIODS

1. From 190 pm every Sat to 7 am on the following Monday.

2. From 10 pm on eve of PH to 7 am on the day following PH


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Construction Site


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Construction Site


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CP 49 : 1998 CODE OF PRACTICE FOR

NOISE CONTROL ON CONSTRUCTIONAND DEMOLITION SITES


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Free Field


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Reflection from wall

3 dB(A) higher


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Reflection from each wall

6 dB(A) higher


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Source outside line of sight


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B.5.2 Allowance for reflection of sound at a

building faade

When the sound level at a building faade is to

be estimated, an additional of 3 dB(A) should

be made to the value calculated for an open

space to allow for the effect of reflection ofsound from the faade. In situation where

multiple reflections occur immediately outside

a building due to several surrounding walls,

sound levels may be increased even further.


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C.2 Control of noise from construction sites

The measurement of ambient noise level must becarried out either prior to the start of the project, or if

the project has already commenced, during periods

when there is no noise producing activity being carried

out on the site in question.

The ambient noise levels should be measured over a

chosen period of time, say 12 h (from 0700 hrs to 1900

hrs or from 1900 hrs to 0700 hrs). The ambient noise

levels so obtained will give an indication of the current

noise status of the site prior to any constructionactivity.

construction noise

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