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Design Build 5ervice5, Inc. <br /> Engineering & Construction Management Phonc/FaK:(360)793-9659 <br /> 28179- 120th SL.5.[.,Monroe,WA 98272 E-mait:rheideC4Ddb5monroe.com <br /> September 22, 2009 C��aS-aUS <br /> Sebastian Gae <br /> Design Sebastian <br /> 27328- 102nd Ave NW <br /> Stanwood, WA 98292 <br /> (360)629-5336 <br /> Subject: Siew Residence Exi,ting Shear Wall Question <br /> As requesled I have reviewed lhe situation where after starting work on lhis job it was discovered that <br /> the wall sheeling was installed horizont�'�y without blocking the horizontal edges.This is a common <br /> construction system in Canada and has been addressed by APA in APA Report 154.Their testing <br /> showed lhal for a slandard 6"o.c.wall with sWds al 16"o.c. the shear wall capacily was reduce by <br /> half. <br /> I have gone back to the original engineering and reviewed the calcuiated shears in these walls.The <br /> main Floor side walls(y1 and y2)and the basement end wall(x4)are ok as-is. <br /> Engineering and summary sheel are attached. If you have any further queslions or I can be of any <br /> further assistance please call me at lhe above number. <br /> \``t'R,�° �. ,y �a D �, ;�,;-_�.� <br /> � , � �,,,Il',l� � � -- <br /> 1�; <br /> �fP2 ,? ... ,J � D <br /> � - <br /> 03 �o ��' C1TY Ot= E.b,!_� <br /> �FSB��N�����? � /z 2 /c� '—`°-�'err:��t ,;,,,,,.HF_..r7' <br /> . :cr� <br /> /� - <br /> Rick Heide, P.E. <br /> Presidenl <br /> Attachments <br />