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Building Reviewer Comments: <br />The height of the walls and loading conditions (e.g., close proximity of wall tiers, etc.) require a building permit per IBC Section 105.2 <br />(i.e., work is not exempt). A geotechnical evaluation and report should be performed per IBC Sections 1803.1 and 1803.6. The report <br />recommendations should include but are not limited to: <br />a. General design criteria, including but not limited to surcharge loads behind the walls, maximum soil slope behind the walls, wall <br />foundation preparation and minimum bearing strength, and drainage requirements. <br />b. Evaluation of the wall loads on successive downhill tiers. <br />c. Evaluation of the upper wall tiers on the existing rockery. <br />d. Designs for the different wall configurations, including walls requiring supplemental geogrid reinforcement. <br />2. The construction drawings should include project specific sections through the full height of the wall system, including the existing <br />rockery. See IBC Section 107.2.1. <br />3. The minimum spacing between wall tiers should be specified in the drawings, including the existing rockery. See IBC Section 107.2.1. <br />4. The drawings should be sealed and signed by a professional engineer licensed in the state of Washington. See IBC Section 107.1, and <br />RCW Sections 18.43.010, 18.43.020, and 18.43.070. If preferred by the design team, the geotechnical engineer may elect to serve as the <br />engineer -as -record (EOR) for the drawings prepared by the landscape architect. <br />Page 2 of 2 <br />