3426 TULALIP AVE 2024 Plans 2025-09-12

The pipe pier shafts will be supported for their full length against buckling. They will be installed in gravelly soil that has no acidic conditions that would deteriorate the steel piers. I anticipate that a hard bearing layer is probably present about 15 to 20 feet below the footings based on this being mostly a glacially consolidated marine sediment soil. I have calculated that the pressure used to drive the piers should be at least 18,500 pounds of equivalent torque capacity at the rear wall of the house and garage and 10,000 pounds at the north side gable end wall of the garage. I used a snow loading of 25 psf at the roof and 50 psf at the garage floor with dead loading consistent with the materials used. The piers along the north and west walls should not be spaced further than 7 feet apart. Once the wall is lifted, I recommend that an expansive polyurethane fill be injected through and under the floor slab to fill any voids created by lifting the foundation and wall. In conclusion, I found that the rear wall of the house and garage at the Dawson Family residence at 3426 Tulalip Avenue in Everett, Washington have experienced up to 3'/.-inches of settlement with additional settlement along the entire north side wall of the two-story garage and residence. t the right front or east corner. Please refer to my attached repair plan for lifting and stabilization recommendations possible with a total of eleven hydraulically driven helical piers with foundation brackets placed under the footings and a polyurethane fill injected under the slab after the wall and floor is lifted. I have enjoyed working with you on this project. If you have any additional questions, comments, or concerns please feel free to call. Sin s yV11 - mot ;: n, E_' EXPIRES 6/9/ 2�f.