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// CODE SNIPPET

42-22 Performance Standards Regulating Vibration

NYC Zoning Resolution > IV Manufacturing District Regulations > 2 - Use Regulations > 42-20 Performance Standards > 42-22 Performance Standards Regulating Vibration
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42-221 Definitions

For the purposes of this Section, the following terms are defined:
Frequency
A "frequency" is the number of oscillations per second of a vibration.
Impact vibrations
"Impact vibrations" are earth-borne oscillations occurring in discrete pulses at or less than 100 pulses per minute.
Steady state vibrations
"Steady state vibrations" are earth-borne oscillations that are continuous. Discrete pulses that occur more frequently than 100 times per minute shall be considered to be steady state vibrations.
Three-component measuring system
A "three-component measuring system" is a device for recording the intensity of any vibration in three mutually perpendicular directions.

42-222 Method of Measurement

For the purpose of measuring vibration, a three-component measuring system approved by the Commissioner of Buildings shall be employed.

42-223 Maximum Permitted Steady State Vibration Displacement

In all Manufacturing Districts, no activity shall cause or create a steady state vibration at any point on any lot line, with a displacement in excess of the permitted steady state vibration displacement for the frequencies as set forth in the following table for the district indicated.
MAXIMUM PERMITTED STEADY STATE VIBRATION DISPLACEMENT
(in inches)
District
Frequency
(cycles per second)
M1
M2
M3
10 and below
.0008
.0020
.0039
10 - 20
.0005
.0010
.0022
20 - 30
.0003
.0006
.0011
30 - 40
.0002
.0004
.0007
40 - 50
.0001
.0003
.0005
50 - 60
.0001
.0002
.0004
60 and over
.0001
.0001
.0004

42-224 Maximum Permitted Impact Vibration Displacement

In all Manufacturing Districts, no activity shall cause or create an impact vibration, at any point on any lot line, with a displacement in excess of the permitted impact vibration displacement for the frequencies as set forth in the following table for the district indicated.
MAXIMUM PERMITTED IMPACT VIBRATION DISPLACEMENT
(in inches)
District
Frequency
(cycles per second)
M1
M2
M3
10 and below
.0016
.0040
.0078
10 - 20
.0010
.0020
.0044
20 - 30
.0006
.0012
.0022
30 - 40
.0004
.0008
.0014
40 - 50
.0002
.0006
.0010
50 - 60
.0002
.0004
.0008
60 and over
.0002
.0002
.0008

42-225 Special Provisions Applying Along District Boundaries

Whenever an M2 or M3 District adjoins a Residence District, the steady state and impact vibration displacement, measured at the district boundary, shall not exceed the maximum permitted for an M1 District for the frequencies as set forth in the tables in Section 42-223 (Maximum permitted steady state vibration displacement) or Section 42-224 (Maximum permitted impact vibration displacement).

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