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fle— <br /> Swenson Say Faget <br /> STRUCTURAL ENGINEERING <br /> 0 2124 Third Ave.Suite 100 <br /> Seattle,WA 98121 <br /> O 206.443.6212 <br /> 934 Broadway,Suite 100 <br /> Tacoma,WA 98402 <br /> July 12,2017 O 253.284.9470 <br /> Lisa Miller,Chief Operating Officer ssfencainee s cam <br /> Community Health Center of Snohomish County <br /> 8609 Evergreen Way <br /> Everett,WA 98208 <br /> Re: Responses to June 21,2017 City of Everett Review Comments <br /> Plan check#B 1705-065 <br /> CHCSC Rucker Avenue <br /> Everett,WA <br /> Following are our written responses to the June 21,2017 City of Everett review comments for the <br /> project. <br /> Structural <br /> Item 5. <br /> IBC 2015 code-level forces are being used. While the building is not being required to comply with <br /> current building code due to the nature and extent of work being done,the level of work is more or less <br /> similar to Level 2 alterations as described in IEBC Section 504. Level 2 alterations point to Chapter 8 of <br /> the IEBC. IEBC Section 807.6,Voluntary lateral force resisting systems alterations,does not require <br /> use of full IBC level forces however full IBC forces were used for the braced frame design as these are <br /> new elements added to the building. The overall project does not reduce the existing lateral load <br /> resisting system capacity or increase lateral loads on the building. <br /> Item 6. <br /> While Special Concentrically Braced frames are being designed for the project,the project is a <br /> voluntary seismic retrofit of an existing building. The existing building has a complete lateral system <br /> even though the existing lateral system consists of non-compliant steel moment frames. The <br /> redundancy factor of 1.0 was used because,independent of the new braced frames,there is an existing <br /> lateral system for the building. Removal of one of the braces in the braced frame system will not result <br /> in a reduction in story strength or extreme torsional irregularity. <br /> Item 7. <br /> The upgrades proposed seek to intercept the diaphragm loads before they reach the masonry elements at <br /> the exterior wall lines in order to significantly reduce the seismic loads to those elements. The brick <br /> masonry cannot be decoupled from the building system due to the fact that the masonry occurs as wraps <br /> around some horizontal steel framing and as wraps around steel columns. Based on our review of the <br />