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REC'e- VED MAY 2 . 1989 <br />AP'A SUMMIT TECHNOLOGY <br />CONSULTING ENGINEERS, INC., P.S. <br />Hussman Associates May 20, 1989 <br />12337 30th Avenue N. E. <br />Seattle, Washington 98125 <br />Re: A 295 Unit Apartment Complex at 108th S.W. and Evergreen Way S. <br />Everett, Washington <br />Attention: Mr. Larry Mitchell <br />Dear Larry: <br />This letter is to confirm the approved modifications to the structural <br />construction drawings on the above referenced project. They are listed as <br />follows: <br />o For interior and exterior shear walls, 2 X 4 nailers on top of top plates <br />as detailed per typical wall sections will not be required if 2 X <br />blocking between top plates and the horizontal diaphragm are toe nailed <br />directly to the top plates. Size and spacing of nailing shall be per <br />shear wall schedule. Toe nail zpacing shall not be closer than 4" O.C. <br />If two rows of nailing or less than 4" O.C. of nailing are called out on <br />the ehear wall schedule, then provide double blocking and toe nail from <br />each side. <br />o In accordance with the general structural notes, bearing walls with two <br />floors and a roof on top of them will require 3 X 4 studs at 16" O.C. <br />This is based on the general condition that the bearing walls are <br />supporting the floors and the roof. If roof framing is oriented <br />differently and the walls are supporting the two floors only, 2 X 4 studs <br />at 16" O.C. shall be adequate for the bearing walls. <br />0 Based on ICBO Research Report No. 2451, the pres-on corner fastener by <br />Prest-on Company is an acceptable sbustitutien of the corner stud for <br />shear wall. It is our engineering opinion that the pres-on corner <br />fastener shall not be considered as the substitution for the hold-down or <br />corner tie. Where hold-downs or corner ties are called out on <br />non -bearing walls, it is structurally acceptable to eliminate the <br />hold-duwns and/or corner ties and provide two continuous 2 X joists on <br />top of the wall and fully seated on the bearing wall on both ends. <br />I believe this letter will satisfy your current needs. If there is other <br />information you need from a structural point of view, please contact me. <br />Sincerely, <br />SUMM T TEC AOLOGYHONSULTING ENGINEERS, P.S. <br />tzz <br />Wei J. H P.E <br />Prinripa1 <br />615 Second Aven Suite 580 Seattle. WA 98104 (206) 622-0222 <br />FAX (206) 622-4764 <br />