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JACK A. SWARDZ ( �,� � � v � � <br />CONSULTING ENGINEER <br />10738 169th Avenue S.E., Renton, Washington 98059 (425) 235-0810 <br />October 8, 2008 �U%� ��', � ? � <br />1/ � r` � � IVI <br />Nicole Stremlow Gretchen and Craig Bekins `����' I;; �ry� <br />1Q002 Aurora Avenue North, Suite 516 8420 Xavier Way ��'� <br />Seottle, WA 98133 Everett, WA 98208-7�Q�5Q�ITY OF _-_ <br />9rneeri��1�,,L �� . . <br />Subject: Roof Structure, 8413 Xavier Way, Everett, WA •• <br />Dear Nicole, Gretchen, and Craig: <br />A roof modification is underway along with other extensive remodeling on the sub�ect <br />residence. The roof structure is a system of "built on site" trusses, spaced on 24 mch <br />centers. The truss system is constructed of 2x4 members with nailed connections <br />using plywood gusset plates. I have evaluated the. trusses and found that the individual <br />members are adequate to support the predictable, roof loads that are expected. <br />However, the nailed connections are not ade.^,::ate and are in need of additional nails. <br />The end joints of the juncture of the ceiling joists and the rafters, immediately above the <br />supporting walls, must have no less than 50 8d nails in each member for a total of 100 <br />nails. 25 nails may be installed from one side and the other 25 from the opposite side. <br />Some additional gusset plate area may be needed to make a reasonable connection. <br />Other joints are not as heavily I� ided and will require 40 8d nails in each member in the <br />joints. 20 nails may be installed from each side. <br />Typically, 3/4 inch plywood gussets are needed to facilitate this type of connection. The <br />actual outside dimensions of the gussets are left up to the contractor. However, I <br />recommend a minimum edge distance of 1-1/4 inches and a minimum spaci�,g of the <br />nails of 1 inch centers. My assumptions are that the nails are common 8d sinkers, <br />measuring 2-1/?_ inches long by 0.131 inches in diameter. <br />This may seem like a significant amount of nailing. However, when compared to a <br />premanufactured truss with steel giissets, it is equal in structural integrity. <br />If I can be of further assistance in this matter, please call. <br />Sincerely yours, <br />Jack A. Swar� <br />