Laserfiche WebLink
Structural Design Associates <br />North Star Building <br />2210 Hewitt Ave., Suite 401 <br />Everett, WA. 98201 <br />(425)339-0293 <br />October 9, 2001 <br />Gaffney Construction Inc. <br />Atm.: Jim Gaffney <br />10511 19th Ave SE, Suite C <br />Everett, WA 98208 <br />Subject: Sievers Residence —1330 Mukilteo Blvd. -Everett, WA — Alternate Roof Diaphragm <br />SDA Ref. # 530 <br />To whom this may concern: <br />At the request of Jim Gaffney, this office calculated the roof diaphragm ;h <br />ear load for the subject <br />residence. <br />Skip sheathing was used to support a wood shake roof replacing the plywood sheathing and asphalt <br />shingles shown on the approved set of drawings. The diaphragm shear load exceeds the allowable shear <br />load for skip sheathing. <br />The bottom side of the truss bottom chord may be used as the diaphragm. Calculations show that 15/32 <br />CDX sheathing is required, nailed with 8d spaced at 6 inches on center (8db@b6l (panel ocked toe12 e), i n from <br />(panel field), and 8d @. 6 (boundary edge). This plywood diaphragm <br />must both ends. The plywood diaphragm must be connected to the perimeter walls per detail 1 &2. <br />Please contact this office if you have any questions concerning this plan change. <br />Very Yours <br />Chris Covingt , P.E. <br />EX°k7E5 - ' a - CZ_ <br />CITY OF EVERETT <br />REVIEWED FOR PERMIT <br />Thi., �& t <br />KJ <br />DRAWINGS SHALL <br />BiE ON JOB SITE <br />AT ALl_ TIMES. <br />1p/l dal <br />V ECU IV <br />OCT 10 2001 <br />CITly2-e�004FI NOE ETT <br />permit Services <br />