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September 17, 2007 <br />Mr. Ross Langhans <br />Structures Unlimited , Inc. <br />5425 Clayton Drive <br />Maple Plain, MN 55359 <br />Re: Big Island Additional Level <br />MMY Job#: 07473 <br />Dear Ross: <br />Mattson <br />Macdonald <br />Young <br />structural <br />engineers <br />Basset Creek Business Center <br />901 North 3rd Street, #100 <br />Minneapolis, MN 55401 <br />612-827-7825 voice <br />612-827-0805 fax <br />sent via email <br />At your request, we have performed an initial structural review of the Big Island Additional Level project. <br />Our review was based on several phone conversations with yourself and Tina of Structures Unlimited, <br />Inc., plans prepared by Structures Unlimited labeled PRELIMINARY PLANS FOR CITY REVIEW, and <br />limited preliminary calculations. <br />Attaching an addition to the rear of the house and adding a level to the existing structure by removing the <br />existing roof and providing new attic trusses is structurally feasible provided reinforcement is provided to <br />the existing headers, rim beams, footings, and miscellaneous items as necessary. <br />It is my understanding that Mattson Macdonald Young will be involved during the construction documents <br />phase of work to provide structural information as necessary. <br />The above opinion is based on discussions with Structures Unlimited, limited calculations, and a field <br />observation. This opinion does not address any other portions of the structure, nor does it provide .any <br />warranty, either expressed or implied, for any portion of the structure. No attempt was made to perform <br />an exhaustive investigation of all conditions and building elements. It is possible that conditions exist that <br />cannot be discovered or judged as a result of this limited nature of investigation. <br />Feel free to call if you have any comments or questions. <br />Sincerely, <br />~- <br />Ar I en P. Grant, P.E. <br />Mattson Macdonald Young, Inc. <br />#3323