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The Hydraulic Crusher used to quickly crush and remove suspended floor slabs walls upstands and airways reducing the concrete to rubble CRUSHING CASE Hydraulic Crushser Specification The HD420 crusher allows the demolition of concrete and reinforced concrete up to 40 cm thickness with strength and precision.

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420000 US construction workers are exposed to potentially hazardous noise levels above 85 dBA 2 In the construction industry heavy construction equipment is a major contributor to high noise levels at most job sites This research was performed to identify the overall Aweighted sound levels of heavy construction equipment and the .

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5 NOISE SOURCES operations and equipment including crushing riveting blasting quarries and occupational noise level above 85 dBA this number has increased to out after a source ranking study using identification and quantification machines VDI 3757 handguided tools VDI 3761 machines for the forming of concrete.

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The Noise Reduction Rating NRR needed for each piece of equipment is given For equipment not listed please contact EHS at 3921591 for an evaluation Noise Source Sound Level NRR Needed Time Allowed Airboat 108 dBA 30 2 minutes Band Saw 104 dBA 26 6 minutes Blender 91 dBA 13 2 hours Blower 99 dBA 21 19 minutes Concrete Saw 112 dBA 34 1 minute.

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noise measured during a prescribed period such as 1 minute 15 minutes 1 hour or 8 hours It is the decibel sound level that contains an equal amount of energy as a fluctuating sound level over a given period of time CNEL Community Noise Equivalent Level is the average equivalent Aweighted sound level over a 24hour period This .

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