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, <br /> . . . <br /> NOTCH <br /> ENGINEERING <br /> CO1250 Morningview Drive <br /> ■ Mound, Minnesota 55364 <br /> (612)472-5566 RECEtVED <br /> April 28 , 1994 MAY 2 1994 <br /> Mr . Lyle Oman , Building Official C�'TYAFORONO <br /> City of Orono <br /> P.O. Box 66 <br /> Crystal Bay, Minnesota 55323 <br /> Re : Mr. Stankovski ' s Residence - Screen Porch Addition <br /> 1290 Lyman Avenue , Orono, Minnesota <br /> Mr. Oman, <br /> Notch Engineering Co. reviewed the wood roof trusses for <br /> the above referenced residence addition in order to determine <br /> if the roof would be structurally adequate . The construction <br /> plans were prepared by Mr. Michael Sharratt and are dated <br /> December 10 , 1993 . <br /> The trusses consist of 6x12 main ridge beams from opposite <br /> corners of the porch to the center peak and a 6x6 secondarti <br /> brace beams connecting the ridge beams at mid span. The roof <br /> slopes at 5 3/4" in 12" to match the slope of the existing <br /> residence . Refer to the construction drawings for plan <br /> dimensions and details . <br /> We found the sizes of the roof beams to be adequate if western <br /> cedar select structural grade or douglas fir no . 1 grade woods <br /> are used in the construction. The four ridge beams that meet <br /> at the peak are to be connected with 3/16" thick bent steel <br /> plates with two 1/2" diameter bolts per beam. The connection <br /> between the ridge beams and the secondar,y brace beams shall be <br /> a pair of 3/16" thick steel plates with three 5/8" diameter <br /> bolts per beam. Refer to Detail "A" on the attached sheet for <br /> the specifics on this connection. The secondary brace beams <br /> are to be notched at the intersection point to allow an <br /> uninterrupted 3" x fi" section to pass through. Four Angles <br /> 4" x 4" x 1/4" with a length of 5 1/2" shall be bolted through <br /> the secondary brace beams with two 1/2" diameter bolts at the <br /> intersection of the beams . <br /> Notch Engineering ' s review was limited to the addition' s wood <br /> roof truss s,ystem only. Review of the remainder of the <br /> addition and the existing residence was not in our scope of <br /> work and was not performed. <br /> If you have any questions or comments on this wall please feel <br /> free to contact me . <br /> Sincerely yours , <br /> ��%i���' �n� <br /> Thomas E. Notch, P.E . <br /> STRUCTURAL DES/GN SERV/CES <br />