Laserfiche WebLink
<br />' i <br />i <br />l <br />h <br />l <br />h <br />h <br />1 <br />i <br />h <br /> g <br />t of not <br />an <br />ave a tota <br />stat <br />c we <br />ess t <br />0 tons w <br />t <br /> at least 90 percent of this weight being transmitted to <br /> the ground through the drum when the roller is standing <br /> on level ground and attached to the pulling equipment. <br />I The drum shall not be less than 50 inches in diameter and <br /> 72 inches in width. The vibration frequency of the roller <br /> during operation shall be between 1,100 and 1,800 <br /> vibrations per minute. Self-propelled vibratory rollers <br />' may be used, subject to the approval of the Engineer. <br /> 6.9.5 Special Compactors <br /> <br /> Special compactors may include: <br /> <br /> • Loaded dump trucks; <br />' Hand guided, heavy-duty mechanical tampers; <br /> Hand guided vibratory rollers; and <br /> • Such other compaction equipment as may be <br />E <br />d b <br />th <br />i <br />f <br />i <br /> approve <br />y <br />e <br />ng <br />neer <br />or use <br />n restricted <br /> areas or near certain critical installations. <br /> <br /> Special compactors shall be capable of producing, with a <br />' reasonable number of coverages, the specified densities <br /> in the fill material on which they are used. <br />Only hand-guided mechanical tampers or hand-guided <br />' vibratory rollers shall be used for compaction around, <br />over, near, or adjacent to pipes, culverts, and concrete <br />structures. <br />i <br /> <br />1 <br />t <br />N-20 <br />