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STRUCTURAL <br />F`----",rNWENGlNEERS <br />Engineers Northwest Inc., P.S. <br />February 10, 2014 <br />PSF MECHANICAL <br />9322 14th Avenue South <br />Seattle, WA 98108 <br />Attn: Michael Harshman <br />Re: FLUKE — CSS Building <br />1420 75th Street SW Everett, WA <br />Replacement Mechanical Unit <br />Michael: <br />It is my understanding that you are anticipating removing an existing mechanical unit <br />and replacing it with a new unit that weighs less. The building structure appears to have <br />performed well for over 35 years. <br />Section 3404.3 of the 2012 ICC allows for a 5% increase in the load on the roof without <br />requiring modification to the original structural members. By adding a lighter unit you <br />will be reducing the dead load on the roof and will not need to revise the roof structure. <br />I have included details which outline a partial roof framing plan and connection of the <br />unit to the roof structure below. I have also enclosed structural calculations. <br />Please feel free to call if you have any questions. <br />Sincerely, <br />ENGINEERS NORTHWEST, INC., P.S. <br />l� <br />Dale Kaemingk, P.E., S.E. <br />Vice President <br />Attachments <br />DK: bs <br />ENW Project No. 14000012 <br />We get <br />buildings <br />built. <br />0 , ° . . . . . . . <br />© 9725 Third Ave NE, Suite 207 ^ Seattle, WA 98115 <br />° 206,525.7560 • fax 206.522.6698 <br />www.engineersnw.com <br />