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, 1 1 <br /> �ic�C�ry �n�ineerin�� �.ansu��in�,j�LC <br /> :-�h-,. �,11 �..��G �x��,�[? ;`.<7:� �� ,;:���,(�iN ��3�;_<<.�� <br /> , .,�. � _ , ,_ r�:x� ;,��-� � ,;;, <br /> , <br /> ,.._<���,<:,,«����:.��„�. �„� <br /> Boulder Wall Calculations - 4.5-Foot Total Wall Height (North Wall) <br /> Project VEC 14-003 - January 5, 2014 <br /> 1161 Elmwood Avenue, Orono, MN <br /> Page 2 of 2 <br /> Calculate Overturnin4 Moment: <br /> Driving Moment, Mo:_ �O.S�Ka•�ys•Hr�Hr�cos(SI - �)•�Hr�� + �qs•Ka•H•�H�� Mo= 530.1 lbf <br /> 3 2 �`_� <br /> Calculate Resistinq Moment: �,a'�r <br /> Resisting Moment is calculated by taking the sum of the weights time��e moment arms for each section of wall above <br /> � <br /> W I•(Wba- Wt)��-� ��� � <br /> M 1 := 3 M I = 405 lbf �Y <br /> Ifr <br /> �� <br /> W2��(Wba - Wt) + W�� ,>� � <br /> M2:_ � M2 = 10801bf � <br /> �1�� <br /> Wba <br /> W2• — <br /> M3 :_ � M3 = 67 bf <br /> lft <br /> Resisting Mom ent, Mr:= M 1 + M2 3 Mr= 21601bf <br /> � <br /> Factor of Safetv, Overturninq: �� <br /> FOS Overturning, FOSot:- r FOSot= 4.074 <br /> Mo <br /> I hereby certify that thi lan, specification, or <br /> report was prepared der my direct supervision <br /> and that I am a dul icensed Professional <br /> Fnninaar iinriar th aw�nf iha State nf Minnasnta_ <br /> Ronald W. Vickery, PE <br /> Registration Number: 24065 <br /> January 5, 2014 <br /> -�n�ineerrn�`�olutions foran��nsta�e �or1c� <br />