2721 WETMORE AVE MARQUEE APARTMENTS 2023-06-28

• • Mr. Art Skotdal Skotdal Real Estate Plan Check Number: PW1907-055, First Building Review - Shoring August 2, 2019 Geotechnical 1. The geotechnical report included in the submittal documents was prepared by Associated Earth Sciences, Inc., dated May 28, 2019. The report was discussed via telephone with Steve Siebert on August 1, 2019. Based a review of the report and discussion with Mr. Siebert, it appears the report may contain multiple discrepancies and omissions. In addition, the shoring plans show shoring systems and conditions that do not appear to be addressed by the geotechnical report. The report and the shoring drawings should be reviewed by the geotechnical engineer, and the report revised as needed to verify that the geotechnical recommendations are correct and consistent with the shoring design. Specific issues are discussed in the subsequent comments; these are provided to assist in the review and are not intended as a comprehensive list of items that need to be revised in the report. See IBC Section 1803.6 Item 7. 2. Section 13.1 "Soil Nailing"of the geotechnical report provides design soil parameters on page 15. The narrative also includes a reference to Figure 3 for a representation of the"lateral earth pressures that can be used for the design of the soil nail system." See also the following comment. It is understood that only the design parameters should be used for the soil nail wall design, and that the reference to Figure 3 is incorrect. The geotechnical engineer shall verify and revise the recommendations as needed. 3. Section 13.1 "Soil Nailing"of the geotechnical report does not include recommendations regarding live load surcharges. It is noted that recommendations for the soldier pile wall system in Section 13.2 include surcharge recommendations. The geotechnical engineer shall verify is similar recommendations should be included in Section 13.1. 4. The design soil parameters for the soldier pile wall recommendations are unclear. Section 13.2 "Soldier Pile Wall"of the geotechnical report states on page 16 that live load surcharges should be included, and suggests a typical value of 250 psf. This value is inferred on page 18 by the recommended earth pressure of 25(H+2), where the"2" is represents an additional 2 feet of soil and is equivalent to the traffic surcharge. However, the narrative on page 18 references Figure 4 for the recommended earth pressures on the soldier pile wall, which are not consistent with the page 18 recommendations (e.g., 75 psf traffic surcharge over the top 10 feet). Figure 3 is consistent with these recommendations, but is not referenced in Section 13.2. The recommendations for the soldier pile walls should be verified. 5. Section 13.2 "Soldier Pile Wall"of the geotechnical report states on page 16 that surcharge loads should be included, and includes the loading from adjacent buildings as one of these surcharge loads. However, it is understood that the building surcharge may be unintentionally stated with the remaining types of loads, which are all related to construction activities. The report should verify if the surcharge recommendations are intended to account to surcharge loads from the adjacent buildings. 6. Figure 3 is referenced in Section 13.1, but is not consistent with the soil nail recommendations. The loading in Figure 3 is consistent with a portion of the recommendations in Section 13.2, but it is not referenced in this section. It is understood from discussions with Mr. Siebert that this 0 3200 Cedar Street © 425.257.8810 0 everetteps@everettwa.gov Everett,WA 98201 425.257.8857 fax everettwa.gov/permits CFca—g—e2c