500 LAUREL DR 2016-01-01 MF Import

Geotechnical Engineering Study Page 47 00-2267 Three Story Addition - 500 Laurel Street, Everett January 31, 2001 integrity and capability of the foundation and allows for a reasonably economical foundation (grade beam) design. In our professionai opinion it is aiso acceptable to increase to allowable axial pile capacity by one third when considering shnrt term transitory wind and seismic loads. After the pin-piles have been successfully installed and tested the new reinforoed concrete foundation should be formed and poured around the tops of the pin-piles. Pin-Pile Proof Testing: In order to verifij that refusal, and thus the design capacity, is achieved we recommend that each pin-pile be proof tested. Proof testing consists of redriving each pile, after the contractor considers he has achieved driving refusal (as described earlier), for one full minute under our representatives' visual observation and recording the penetration achieved. If less than one inch of penetration is recorded, the pile is considered to meet the project specification and is acceptable. If more than ona inch of �enetration is achieved the driving is continued until the penetration meets the refusai criterion. Our representative will monitor the proof testing and will develop a summary of the proof test data which will include the penstration achieved f�r each pile during the proof testing, the approximate pin-pile location, and the piles' installed length. The data tabulation, along with a written final report summarizing the results of the pin-pile instaliation program, will then be submitted to you and the City of Everett. G7