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Mr. & Mrs. David Rahn <br />July 24, 1997 <br />Page Two <br />4. The following observations were made regarding the existing foundation: <br />a. Tlie existing foundation is three courses of 8 ” concrete masonry totaling 20 <br />in height. <br />b. The footing is cast-in-place concrete averaging 6" to 8" thick and about 16 <br />wide. <br />c. The bottom of footing is approximately 26" below the bottom of the floor <br />joist. <br />d. The foundation wall exists at the perimeter of the structure. <br />interior structure is supported on wood beams and wood posts. The floor <br />framing spans front to back. <br />f. The fireplace is supported on a concrete pad at footing elevation. <br />g. The concrete masonry foundation appears to be in good condit'on with some <br />tuckpointing necessary. <br />h. A crawl space opening about 4 feet wide exists along the west wall. <br />5. Based on calculations, the bottom of footing is approximately 18 below grade <br />assuming that grade will be 6" below bottom of treated plate. <br />6. Minnesota State Building Code requires frost footings at least 42" below grade. In <br />my opinion, this matter must be addressed and a footing system installed to frost Ime <br />of 42". <br />STRUCTURAL ANALYSIS <br />7. A structural engineering analysis has been completed by J. H. Dahlmeier Engineering, <br />Inc. to determine loads to the existing 8" concrete masonry foundation walls. <br />8. Consistent with the Minnesota State Building Code, the capacity of the 8" masonry if <br />core filled, will exceed the design load.