3426 TULALIP AVE 2025-09-12 - Laserfiche WebLink

WOLDEIV Tim Wolden.PE,SE 34930 Hwy 53 STRUCTURAL Nehalem,OR 97131 (541)915-6389 cell ENGINEERING LLC (503)368-7962 office } (503)368-7963 fax Practical Structural Engineering Solutions tim[aiWoldense.com August 27, 2024 Alison Erdman Ram Jack West PO Box 11701 Eugene, OR 97440 Re: Special Inspection Report for Foundation Repair— Support for the Dawson Residence at 3426 Tulalip Avenue in Everett, Washington (Permit#B2408-002) Dear Alison: We have verified that the piers described in our June 201 repair plan for lifting and stabilizing the Dawson Family garage and residence at 3426 Tulalip Avenue in Everett, Washington have been installed in accordance with our directions. The north side and rear bearing wall of the two-story garage with residence above had settled by up to 4-inches with additional settlement around the west side of the home. The Homeowner wanted the structure to be lifted as much as practical and permanently stabilized against future settlement. I had originally specified the use of eleven (11) hydraulically driven helical piers to be installed under the foundation. However, during the pier installation, the piers cinder the rear concrete wall were switched to driven piers due to the weight of the heavy concrete walls. Five of the helical piers were converted to push piers without the helical plates. The pier installation was performed by Ram Jack West, certified installers for the Ram Jack steel piers. The six helical piers were installed under the footings of the north side wails of the garage and house used the 4036 low profile brackets and one modified standard bracket (RD3177) along with sections of steel angle placed on top of the brackets. These piers were driven with the 7k drive head and the installation pressure was 2500 psi which exceeded the 10,000 pound capacity stated in the engineering. The five driven piers used the commercial 4021 brackets and the 3.5 inch diameter dual ram to drive the piers. All of these piers were driven to pressures varying from 2800 psi to 2900 psi. All of the piers went to depths from 8 to 18 feet embedding in the consolidated marine sediment soil layer below. The piers allowed the perimeter walls and floor to be lifted by over 2 inches at the northwest comer and to within an inch of level throughout the settled garage and north end of the house above. A polyurethane filler was also injected under the floor slab to fill the voids created by the lift. The piers now ensure that the weight of the home was on the piers for stabilization of the home. In conclusion, the installation of twenty-one Ram Jack helical and driven piers under the east, north, and west sides of the Dawson Residence at 3426 Tulalip Avenue in Everett, Washington was completed in a professional and workmanship manner. In all cases the pier installation was conducted per the Special Inspection criteria listed in the Ram Jack Legacy Report and is in compliance with my recommendations and the standards of the steel pier industry. C ' A. �� T' t4y Waxen