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iechnicof Advisory, Vibrofion iAV•02-UI-R9601 <br />Construction Vibration Levels <br />With the csc~pnon o(a ferv msrtnces invoh•mg paventem breaking, pile drRVng, all <br />.Caltrnns construction vibration measurements have been lxlou• the 5 mm/s (U.2 <br />mjsccl urc•httecnn•al damage nsk level for cominuous vibrations. The highest <br />u _ <br />measured vtbrntion Icvc{ was 73.1 mm/s ('2.88 in/sccl at 3 m (10 (q from s pavement <br />breaker. 'Phts mstancc marked the onh• time that the singly event safe Icvel of 50 <br />1tim Is_(2 in(secl wns cxcec<tcd dunng vibration monitoring by Cnltruns. <br />Other constntction activities and cryuipmcnt, such tts U.g and D-4 Catrrptllnrs, <br />tenrthmovers and haul tntcks have never exceeded 2.5 mm; s (U.IO in/srcl or one half <br />,uf the architectural damage risk level, at 3 m (10 ft(I- Depending nn the activity and the <br />sourer, construction vibreuions vun• much more than trnffic vibrntions. <br />~ -- <br />figure 3 shows typical pile driving vibrntions with distance, for a 68,000 J (SUAUO fl <br />IhQ enrrpw impncl pile driver, for two <li(frrrnt sods Iclat•cy en(I sandy N'IIh s1III• Clif\' <br />