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The bearing capacity of rigid vertical and batter piles under inclined loads in sand has been determined for model piles of different depth/diameter ratios. The first part of this paper deals with vertical piles and the second part will consider batter piles. The results of loading tests on free standing and piled foundations under inclinations of load varying from vertical to horizontal are analyzed. On the basis of plastic theory, a new approach for analysis of rigid vertical piles under horizontal loads is developed by extending Brinch Hansen's method; and previous methods of analysis by Meyerhof are extended to estimate the bearing capacity of vertical piles under inclined loads in sand. Loads on vertical piles are found to be in reasonable agreement with the proposed theories.

Following the previous investigation reported in the first part on vertical piles, this second part of the paper presents an analysis of the results of loading tests on rigid batter piles under inclined load in sand. The bearing capacity of axially loaded batter piles is discussed by comparing experimental results and theoretical estimates. The theory for ultimate resistance of rigid vertical piles under horizontal loads is extended to that of laterally loaded batter piles. Model test results are compared with those of theoretical estimates and good agreement is found. Methods of analysis of vertical piles under inclined loads are extended to those of rigid batter piles under inclined loads in sand and the analysis is compared with some test results.

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Following Part I on vertical piles and Part II on inclined piles the present Part III deals with the general principles for estimating ultimate capacity of a pile bent under inclined load. The results of loading tests on two model pile bents with depth/diameter ratios of 13 and 23 for free standing bents and 15 and 25 for piled bents are presented. Test results on free standing and piled bents are reported in compact and dense states of packing of sand. Bents with vertical and batter piles have been tested under inclinations of load varying from vertical to horizontal.The experimental results are discussed and conclusions regarding the behavior of free standing and piled bents under inclination of load, type of bent, and pile cap are drawn.

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