4800 DOGWOOD DR 2022-02-28 - Laserfiche WebLink

rit- : " SOUND STRUCTURAL SOLIINS ENGINEERSVile 0. 23.The east retaining wall on the north end of the building is an existing cantilevered retaining wall and will be connected to a cantilevered diaphragm at the main floor level. The proposed cantilevered diaphragm will not be rigid enough to restrain the existing cantilevered retaining wall at the top of the concrete. Thus, the lateral earth pressures and associated seismic surcharge will be resisted solely by the existing wall and the proposed diaphragm will not receive any earth pressures. 24.Please see detail FL1/S-2 which includes a redesigned steel ledger capable of resisting both out-of-plane and in-plane shear loading along with gravity load. Please see pages 97-109 of the revised calculation package for the analysis of the new floor ledger connection. 25.Detail FL2/S-2 which includes a redesigned steel ledger capable of resisting both out-of-plane and in-plane shear loading along with gravity load. 26.The seismic overstrength factor need not be applied to the holdown anchorage as the holdown capacity is approximately 25% less than the anchorage for both the cast-in-place and post-installed situations. The anchorage need only be designed for the maximum tension that can be transmitted to the anchors by a non-yielding attachment per ACI 318-14 Section 17.2.3.4.3 (c). 27.Holdowns have been added to wall line 2. The loading on wall lines 4 and D are light and have been checked as perforated shear walls on page 26 of the revised calculation package — no holdowns are required at either of these wall lines. 28.No holdowns are required at the main floor for wall line 4 per the perforated shear wall analysis on page 26 of the revised calculation package. 29.Please see detail FL1/S-2 which includes a redesigned steel ledger capable of resisting the added vertical loads including the seismic overstrength factor from the upgraded shear walls above. This calculation also includes the combined axial and flexural check as the new ledger is also being used to bolster the existing concrete collector. 30.Please see detail FL1/S-2 which includes a redesigned steel ledger capable of resisting the added drag forces. This calculation also includes the combined axial and flexural check from the gravity/overturning loads from above. If you have any questions, require additional information, or believe we have misinterpreted your requests, please call us at 425-778-1023, and we'd be happy to discuss them. 24113 56th Ave W - Mountlake Terrace,WA 98043 - Ph:425-778-1023 - Fax: 206-260-7490 )+