2713 MAPLE ST A & B 2024-01-08 - Laserfiche WebLink

of plywood and OSB of unclear structural capability. Solid panels matching the requirements in the approved construction drawings should be used in the construction. Drew Martin, P.E., S.E. NEAssociate Engineer—Commercial Plans Examiner I Permit Services 425.257.8810 13200 Cedar Street, 2nd Floor, Everett,WA 98201 EVERETT Phone Hours: M/W/T: 8 am - 12 pm & 1 pm—3 pm;Tu: 1:00pm-3:00pm everettwa.gov/permits I Facebook I Twitter Note:[mails 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 From:Jon Conner<LakeviewSE@outlook.com> Sent: Wednesday, September 28, 2022 3:55 PM To: Drew Martin<dmartin@everettwa.gov> Subject: [EXTERNAL] Maple Duplex- Ismail CAUTION:This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi Drew - Ismail asked me to come out this morning and said you had some concerns about a few of the framing items. Attached are the calcs and previous sketch I had provided to them. It sounds like there were 3 items of concern: 1. The new floor lower than the old floor. a. With the rim joist being above the new floor, my concern was it would act as a hinge under high wind loads and want to rotate inward and provide no support for the upper studs. Since the lower wall studs are now braced by the new floor diaphragm and ledger board they will act as cantilevers above the diaphragm. So I calculated how many of the upper studs would have to be extended down to the continuous plate to provide an adequate shear connection. That turned out to be about every other stud. See calculations attached, pgs 8 & 9. I've inspected the framing out there and am happy with the way it turned out. 2. Blocking between the new joist ledgers and the existing studs a. The original concern here was with the shear load path from the floor diaphragm to the existing wall plates. Since the wall plates aren't where we originally planned and (4) ledgerlok's have a shear capacity of over 1,000 lbs at each stud I thought this would be plenty of strength by inspection. We can still add the flat blocking in along the back wall if you want it but I'm not convinced its necessary any more. 3. The single king stud at the window openings. a. IRC table 602.7.5 says 1 king stud OK for openings up to 4 ft. These are all 4 ft windows. I'm fine with it as is. I know Ismail is in a hurry to get these resolved so please let me know if you need anything else from me or if there were any other concerns you had. Thanks, Jon Conner PE, SE Structural Engineer I Lakeview Structural Engineering -- _ C 4/S )