X = + 10 - /TooT^^o" 

 2 



^ 10 + 21.U = 31cU ^ -[_5 |.gg^ Qf. penetration 

 — 2 — ^— 



For 2 H = 



5,750 

 16 X 639 = 10,220 



2 

 o^ -rrS l58 X TS^ »^ „„^ 



29x 16 -5 7nn -^^^ = 20,220 pounas 



- — 2 ~ ^> '-'-^ 2 



19i(6bO Dounds 

 ■which is close on the safe side. 



For£M = Taking moments around the top of the pile: 

 6 X 5750 = 31;, 500 

 17 X 10,220 = 173s800 20.220 x lli.3 = 289,000 foot-pounds 



19.7 X 3,710 =2Bl'^00 foot-DOunds 



which also is close enough and on the safe side. This computed pile pene- 

 tration aoproximately equals the rule of thumb that the penetration should 

 be twice the unsupoorted loaded height, 



14.63 o Determination of File Section. - The points of zero shear will 

 occur at t!ie ground line and at a point "x" below the ground line such 

 that 



X s: 



16 



IUJ47O 



2«,U00 



X s 8.0 feet 





The maximum moment will occur at points of zero shear. At the ground 

 line 



M s 3 X 5,750 m 17.250 foot-pounds 



At 8 feet below the ground line 



M » (871 X 8 X U) M^2_Z^ X 5.3) - (i^^-4^ X 2.7) 



27^,773 + 1^918 - 13,651 = 19, 0^0 foot-pounds. 

 222 



