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Vickery Engineering& Consulting,LLC <br /> 14441 Village Moods Drive,I rAen rrairie,MN 5 5 547-1 509 <br /> rkone: 9 5 246 5-8 272 [=ax: 952-+26-1971 <br /> rvicke ryC�viciceryeng.com <br /> Boulder Wall Calculations - 4-foot Exposed Wall Height <br /> Project VEC 12-052 - July 13, 2012 <br /> Middleton Residence, 720 Tonkawa Road, Orono, MN <br /> Page 2 of 2 <br /> Calculate Overturning 10. <br /> Mom11 [qs.Ka-H. <br /> ( lDriving Moment, Mo:= 5•Ka•-ys•Hr•Hr•cos(S1 - ) (Hr I I + HJ] Mo= 509.71bf <br /> 3 JJ l2 <br /> Calculate Resisting Moment: <br /> Resisting Moment is callcullated by taking the sum of the weights times the moment arms for each section of wall above <br /> WI.(Wba- Wt). �J <br /> MI := 3 <br /> lft Ml = 501bf <br /> W2.[rr l <br /> (Wba- Wt) + Wt <br /> M2:= 2 Oft) M2= 11251bf <br /> W2���a� <br /> M3 := 2 M3 = 9001bf <br /> Ift <br /> Resisting Moment, Mr:= M1 + M2+ M3 Mr= 2075 IV <br /> Factor of Safety. Overturnina: <br /> FOS Overturning, FOSot:= Mr FOSot= 4.071 <br /> Mo <br /> I hereby certify that this plan, specification, or <br /> report was prepared under my direct supervision <br /> and that I am a duly Licensed Professional <br /> FnninPrar 11ndpr the laws of the State of Minnesota. <br /> Ronald ickery, PE <br /> Registration Number: 24065 <br /> July 13, 2012 <br /> nSineerin,g,jolutions for an G/nsta lc World <br />