42-424 - Maximum permitted impact vibration displacement LAST AMENDED 6/6/2024 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# M1 M2 M3 (cycles per second) 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