<p>900mm internal dia, wall thickness not less than 100mm, Re-bar for pipe:- circumferential: 18 turns - 6mmФ for inner cage &amp; 14 turns - 6mmФ for outer cage and longitudinal: 7 nos. - 6mmФ for inner cage &amp; 7 nos. - 6mmФ for outer cage, Re-bar for Collar:- circumferential: 3 turns - 6mmФ and longitudinal: 12 nos. - 6mmФ</p>