A.         No use in any permissible business zone may generate any ground-transmitted vibration that is perceptible to the human sense of touch measured at the outside boundary of the immediate space occupies by the enterprise generating the vibration if the enterprise is one (1) of several located on a lot, or the lot line if the enterprise is one (1) of several located on a lot, or the lot if the enterprise generating the vibration is the only enterprise located on a lot.

B.         No use may generate any ground-transmitted vibration in excess of the limits set for this in Subsection E.  Vibration shall be measured at any adjacent lot line or residential zone line as indicated in the table set forth in Subsection E.

C.         The instrument used to measure vibrations shall be a three-component measuring system capable of simultaneous measurement of vibration in three (3) mutually perpendicular directions.

D.         The vibration maximums set forth in Subsection E are stated in terms of particle velocity, which may be measured directly with suitable instrumentation or computed on the basis of displacement and frequency.  When computed, the following formula shall be used:

 

	PV = 6.28 FxD
Where:
	PV = Particle velocity (inches per second)
	F = Vibration frequency (cycles per second)
	D = Single amplitude replacement of the vibrations (inches)

The maximum velocity shall be the vector sum of the three (3) components recorded.

E.         The Table of Maximum Ground-Transmitted Vibration shall be as follows:

 

Table of Maximum Ground-Transmitted Vibration FIGURE III-3 Particle Velocity (inches per second)
Zone		Adjacent Lot Line		Residential Zone
Commercial districts		0.15		0.02
Industrial districts		0.15		0.02
Residential districts		0.02		0.02

 

F.         The values stated in Subsection E may be multiplied by two (2) for impact vibrations, i.e., discrete vibration pulsations not exceeding one (1) second in duration and having a pause of at least one (1) second between pulses.

G.         Vibrations resulting from temporary construction activity that occurs between 7:00 a.m. and 7:00 p.m. shall be exempt from the requirements of this section.

 

Last Updated on September 29, 2008
This Visual Interactive Code is intended to assist property owners, developers and residents in understanding and applying the Township's land development ordinances; However, the VIC; does not contain the Township's official land use ordinances in the exact form in which they were adopted, and may not contain the most recent versions of these ordinances. Official copies of the Township's land use ordinances may be obtained by visiting Township offices during regular business hours, 8 am to 4 pm, Mondays through Fridays, or by contacting Township staff at 724-935-3090, extension no. 109.