3020 RUCKER AVE SNO CO HEALTH DISTRICT 2020-01-30

b I Drew Martin From: Drew Martin Sent: Wednesday, June 26, 2019 4:07 PM To: 'Mark Payne' Cc: Warner,Alex (Alex.Warner@Harrisgroup.com) Subject: RE: Electronic copy of additional info for 3020 Rucker job Attachments: 20190626155842092.pdf Mark, The submitted documentation is not adequate to address the review comments. This is a substantial project installing multiple heavy units on a roof with existing units to remain. As noted in the letter, a complete construction set must be submitted, including(but not limited to)scaled plans showing the locations of all new and existing units. The sketches provided do not provide sufficient clarity for the existing or proposed conditions. A project of this magnitude requires scaled drawings accurately showing the location of all units. Structural calculations shall be submitted verifying that the framing has sufficient capacity to suppor the new units. Concurrent loading of the old and new units, and other loads(e.g., snow),shall be considered. Periodic aerial photography shows that the existing unit layout has changed, and there is no documentation for the original units on the roof. Therefore, as stated in the review comments,the 5%rule cannot be used. I've discussed the required analysis with the structural engineer. An itemized response letter addressing the comments in the review letter shall be included with the revised submittal documents. In addition to the comments in the letter, please note the following additional observations: a. The number of units being installed is unclear. The mechanical permit application form states that 21 fixtures are being installed, but the narrative only sums to 20 units. The "new equipment" sketch only indicates 11 new units. The number of units being installed shall be clear in the drawings. The application may need to be revised. b. The project includes the installation of 4"Mitsubishi" units as stated on the "new vs old equipment" sketch and shown on the "new equipment" sketch. The "new equipment"sketch states the units weight only 526 lb each. However,the manufacturer's date sheet states that each unit weighs 1,160 lbs;the "526"value is kilograms(kg). For two units at each location,this is new weight of 2,320 lb,which is significantly larger than the previous combined weight of the split compressors (i.e., 297 lb *4= 1,188 lb). c. The attached sketch shows a mark-up of an aerial photo from 2015. The number of units exceeds those shown in the submitted sketches. The mark-up indicates multiple addition units that do not appear to be show in the submitted sketches with an asterisk. Several of the additional units are near the proposed installation location for new units. Please submit a drawing set and supplemental structural package, and an itemized response letter, addressing the review comments. Thank you. Drew Martin, P.E.,S.E. NEAssociate Engineer—Commercial Plans Examiner I Permit Services 425.257.8813 13200 Cedar Street, 2nd Floor, Everett,WA 98201 EVERETT Hours: Monday—Friday 7:30am-12:OOpm and 1:OOpm-4:OOpm everettwa.gov I Facebook I Twitter Note:Emails and attachments sent to and from the City of Everett are public records and may be subject to disclosure pursuant to the Public Records Act. 113