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Vickery E_ngineering& Consulting,LLC <br /> 14441 village Woods Drive,I-der,Prairie,MN 553+7-1 509 <br /> Phone: 952-465-8272 Pax: 952-426-1971 <br /> rvickc rjgQviciceryeng.com <br /> Boulder Wall Calculations - 6-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 Moment: 1 [qs_Ka_H.(H)]Driving Moment, Mo:= CO.5.Ka.•ys.Hr.Hr.cos(61 - *)•(Mr I] + Mo= 1536.21bf <br /> 3 J 2 <br /> Calculate Resisting Moment: <br /> Resisting Moment is calculated by taking the sum of the weights times the moment arms for each section of wall above <br /> Wl•(Wba- Wt)•(2) <br /> MI := 3 lft M1 = 3001bf <br /> l <br /> W2.Ir(Wba- Wt) + Wt <br /> M2:= L 2 M2= 36001bf <br /> r (ll ft) <br /> W2. Wba <br /> M3:= l 2 J M3 = 27001bf <br /> Ift <br /> Resisting Moment, Mr:= M1 + M2+ M3 Mr= 66001bf <br /> Factor of Safety. Overturning: <br /> FOS Overturning, FOSot:= Mr FOSot= 4.296 <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 /> FnninPPr iindpr the laws of the State of MinnPsnta. <br /> onald ickery, PE <br /> Registration Number: 24065 <br /> July 13, 2012 <br /> —,Engineerin,g,5olutions Foran Unstable World/ <br />