Retaining walls; their design and construction . 4-l^,6x6x^. Fig. 58.—Counterfort wall. The design of the counterfort proper (note that a final chock of the dimen-sions just found is omitted—^in actual practice such omission is poor design)is most conveniently made by graphical methods. The skeleton outlineof the truss is shown in Fig. 58. The loads at the i)aiu!l points .4, B, C are,allowing for the ten foot spacing of counterforts: -3 1.83 X 16 , 5 X 16 ^o i a ^ Ti H n — ?^o 2X K 65.5 X 16 1.83 X 16 2 X ^ ^ 2 ? X 16 = 112 12.5 X 15 , 5.5 X 15 , 7 X 16 , 2 X 5.5 X 16 ,„, The stress polygon
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