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Continue to ChatIS 2911 (PART 1 SEC 2)-1979 INDIAN STANDARD CODE OF PRACTICE FOR DESIGN AND CONSTRUCTION OF PILE FOUNDATIONS PART 1 CONCRETE PILES SECTION 2 BORED CAST IN-SITU PILES https://civilengineer.co.in/indian-standard-codes/is-2911-part-1-sec-2-1979-indian-standard-code-of-practice-for-design-and-construction-of-pile-foundations-part-1-concrete-piles-section-2-bored-cast-in-situ-piles/