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Vickery E_ngineering& Consulting,LLC <br /> 14441 villni;e woods Drive,[7--'Ien Pi.91rie,MN 5 5 347-1509 <br /> Prone: oi2-4c5-8272 rax: 952-420"-1971 <br /> ry i ckc ryCavi cke n1 e n K.co m <br /> Boulder Wall Calculations - 3-foot Total Wall Height <br /> Project VEC 17-003 - January 8, 2017 <br /> Willow Hill Guest Residence, Orono, MN <br /> Page 2 of 2 <br /> Calculate Overturning Moment: \ \ <br /> Driving Moment, Mo:= 10- <br /> 5•Ka•^ls•Hr•Hr•cos(81 — ) 3rIi +rgs•Ka•Hr• rlMo= 151 lbf <br /> Calculate Resisting Moment: / L <br /> Resisting Moment is calculated by taking the sum of the weights times the moment arms for each section of wall above <br /> W1•(Wba- Wt).(3) <br /> 2) <br /> — <br /> M1 := M1 = 1001bf <br /> lft <br /> W2•[(Wba — Wt) + W11 <br /> M2:= 2 J M2= 4501bf <br /> (\\l ft) <br /> W2•(Wba II <br /> M3 := 2 ) M3 = 3001bf <br /> lft <br /> Resisting Moment, Mr:= M1 + M2+ M3 Mr= 8501bf <br /> Factor of Safety, Overturning: <br /> FOS Overturning, FOSot:= Mr FOSot= 5.628 <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 under the laws of the State of Minnasnta <br /> XonaldPickery, <br /> Registration Number: 24065 <br /> January 8, 2017 <br /> -'Engineering5o1utions Foran Unstable World <br />