Hawaiian Dredging Driving 17" "Octs" in Environmentally Sensitive Honolulu.		Mizak Constructors Driving AZ--36 Sheets with Dawson 2400.

Two recent piling jobs put a pair of our hydraulic impact hammers to the test. Hawaiian Dredging's Pier 15 job installing 16" octagonal bearing pile, and Mizak Constructors BART station excavation driving AZ-36 sheets that a competitors mast mounted vibratory failed to drive.

Hawaiian Dredging's job in Honolulu needed a quite and clean hammer to drive their concrete pile. Our HPSi model 1250 hydraulic impact hammer fit the bill with a maximum energy of 50,000 ft.lbs. and 88% efficiency into the pile. A special quieting package was tested with the hammer that brought noise levels from 115 dB down to an acceptable 85 dB. Typical diesel hammer inefficiencies and emissions such as smoke, hot oil, and exhaust noise were eliminated.

Mizak Construction's BART station job in South San Francisco entailed driving extremely heavy sheet piling in difficult material. After attempting to use a mast mounted vibratory hammer, Mizak called BMC wanting to try our new line of Dawson sheet drivers. The model 2400 drove the sheets and saved the job.