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t 7D464/1NrikPhAg <br /> A-ll 8 ids ' STRUCTURAL <br /> DEI <br /> DIBBLE ENGINEERS INC SITE VISIT REVIEW <br /> July 30,2021 <br /> 6CI tek <br /> Greens of Merrill Creek Apartments <br /> Care of Amento Group <br /> Attn: Ms. Hannah Smith,Arch Technical Designer <br /> 710 Second Avenue, Suite 400 <br /> Seattle,WA 98101 <br /> Re: Greens of Merrill Creek Apartments Structural Repair re/7)o Building#2 Entry Repair DEI Project#17-077 <br /> Dear Mrs. Smith: <br /> Dibble Engineers completed a site visit on Wednesday July 28,2021 to review a series of clarifications for the <br /> ongoing repairs at the entryway on the east side of building#2. DEI was onsite with Hannah Smith and Charter <br /> Construction to review the framing repairs completed and provide direction on the attachments.The issues discussed <br /> in the field include the following: <br /> 1. Replacement posts at the front corner posts are GLB 5.5x6"members vertically approximately 20' high.The <br /> GLB 5.5x6"is adequate for the proposed loads to be used. Moving forward for available posts that will <br /> extend upwards of 45'tall for the four-story landings,the Contractor requested, and DEI concurs to be <br /> adequate for a continuous post—using a 5.25"x 7.25"PSL column to be adequate. These will be <br /> continuous members from the ground vertically to the roof truss support elevation. <br /> 2. Framing into the GLB post from the walkway is a section of replacement 5.5"x12"GLB to match similar <br /> depth as existing that was replaced. The beam uses an HUC610 hanger into the corner post and bears on <br /> the walkway privacy wall,with a minimum of three studs. <br /> 3. The attachment of the repaired GLB into each end recommends a pair of horizontal strap to wrap around <br /> the post with a CS 16 strap with an end length of 12"to attach the new GLB to the existing. Similar use two <br /> straps at the corner post with 12"to the replacement GLB and wrap around the post 11.5". <br /> 4. Located at the new landing edge the replacement 3.5x12" PSL beam will frame onto a short shearwall <br /> assembly. The vertical corner post provides vertical continuity of the shearwall at the corner. DEI <br /> recommends a vertical CS16 strap aligned above the inside edge of the shearwall up the face of the new <br /> PSL beam. This strap would be over the shearwall plywood sheathing. Nailing should be a 0.131x2.5"nail <br /> at 3"on center edges and 6"on center field and splice over blocking. <br /> 5. Located at the new landing framing,the contractor will use the 3.5"x12" PSL at the top of stairs support <br /> member and at the outside edge over the shearwall. The two intermediate landing joists can use a 2x12 <br /> Doug Fir#2+Btr at 24"on center(A total of 2 landing members)to span the ten feet across the landing. <br /> 6. The roof trusses to the top plate or beam need a positive connection. The contractor requests,and DEI <br /> concurs to use a Simpson Strong Tie SDWC Truss screw in lieu of metal strap hardware. <br /> 7. Located at the roof level,the use of either(2)2x10 or a 4x10 may be used to span the approximately eight <br /> feet between the upper landing wall to the outside corner post. The use of a HUC410 or HUC210-2 may be <br /> used to connect the support beam into the corner post. Provide 2x6 top plates and furring plates as needed. <br /> DIBBLE ENGINEERS INC 11029 Market Street,Suite 200, Kirkland WA 98033 1425.828.4200 I dibbleengineers.com <br />