This Architectural Drawing is AutoCAD 2d drawing of Working Drawing of Pile cap. The overall depth of pile cap shall also be selected such that the effective depth of bottom reinforcement is at least 12 inches. The shape and size of the Pile Caps are normally as below: Hexagonal for six to seven piles. Triangular for three piles. Rectangular for more than seven piles. For more details and information download the drawing file.