STF20070006 Approval 4-13-07.pdfApril 13, 2007
CITY OF EDMONDS
121 5TH AVENUE NORTH • EQMONDS, WA 98020 • (425) 771-0220 • FAX (425) 771-0221
Website: www.0i.edmonds.wa.us
DEVELOPMENT SERVICES DEPARTMENT
Planning • Building • Engineering
Mr. Harry Daugherty, P.E.
H.B. Daugherty Consulting Engineers
6776 Providence Box 2854
Whitehouse, Ohio 43571
RE: Request for Alternate Design @ 160 West Dayton Street
Harbor Square Athletic Club Dome Structure
VIA FACSIMILE
Dear Mr. Daugherty,
GARY HAAKENSON
MAYOR
The City is in receipt of your alternate design request on behalf of Harbor Square Athletic Club air -
supported roof structure located at 160 West Dayton Street in Edmonds to reduce the minimum snow
load requirement. Section 1608 of the 2003 International Building Code includes the provision to
determine applicable snow loads for roof structures. The City has issued a Building Official
interpretation effective July 1, 2004 that the total Snow Load for Edmonds is 25ps£ This decision was
based on the Second Edition of the Structural Engineers Association of Washington (SEAW) Snow
Load Analysis for the State of Washington (revised July 1995) which recommended the Ground Snow
Load for Seattle at 20psf and Rain on Snow surcharge at 5psf.
By your calculations the proposed air supported roof structure cannot sustain a snow load of more than
5psf concentrated at the. crown.. In. reviewing your request you have provided adequate information,
and assurance that roof failure from a snow event would typically take several hours, that such
imminent failure would be obvious to all persons which would lead to a quick and safe evacuation, and
that the building owner will be provided with specific operating and emergency response training and
evacuation instructions from the manufacturer. It is my determination as Building Official for the City
of Edmonds that the request for a reduction of snow Ioad for the air -supported roof structure at Harbor
Square is hereby Approved. As Engineer of Record you shall be required to inform the building owner
of the snow load limitations for the building.
Sincerely,
Jeannine L. Graf
Building Official, C.B.O.
• Incorporated August 11, 1890 •