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, � <br /> �/ic�Cery �ngineering Fy Consultin.��,LLC <br /> 1999 I Vii�ai e yy�oo.�s l7r�ve,�_�tien err��nc,^.�� �5�1'-I 50a <br /> f��onr_: �75Z-•Fo5-3??2 f:�x: a52-4�2�-I?'f <br /> ivic�Cen�Cavic�:en�enr�c.e�m <br /> Boulder Wall Calculations - 4.5-Foot Total Wali Height(South Wall) <br /> Project VEC 14-003A- August 5, 2014 <br /> 1161 Elmwood Avenue, Orono, MN <br /> Page 2 of 2 <br /> Calculate Overturninq Moment: <br /> Driving Moment, Mo= L0.5•Ka•7s•HrHr•cos(S1 - �)•I Hrll + Lqs•Ka•H•I HJ� Mo = 982.41bf <br /> � 3 JJ �2 <br /> Calculate Resistinq Moment: <br /> Resisting Moment is calculated by taking the sum of the weights times the moment arms for each section of wall above <br /> 2 <br /> Wl�(Wba— Wt)• — <br /> I�!� M1 :_ � M1 = 4051bf <br /> Ift <br /> � W2•�(Wba— Wt) + Wt� <br /> ? <br /> 'J M2:= M2 = 1822.5 lbf <br /> (1 ft) <br /> W2 �Wba� <br /> M3 := 2 M3 = 1215 lbf <br /> 1 ft <br /> Resisting Moment, Mr:= M1 + M2+ M3 Mr= 3442.5 ]bf <br /> Factor of Safetv. Overturninq: <br /> FOS Overtuming, FOSoc:_ �r FOSot = 3.504 <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 /> Fnaineer iinder the laws of thP StatP nf Minnesota <br /> Ronald W. Vickery, PE <br /> Registration Number: 24065 <br /> August 5, 2014 <br /> �nYineerin��jolutions�o�an unstable �/(�o�c� <br />