. CONCRETE4.1_Generala. Concrete sizes shown are minimum and no reductions by ducts, pipes, etc. shall be made without approval.b. Pipes or conduits shall not be placed within the concrete cover to reinforcement without The Engineer's approval.c. No hole or chase other than those shown on the structural drawings shall be made in concrete members without prior approval by The Engineer.d. The concrete shall be compacted using high frequency vibrators.e All slabs shall be placed at the same time as beams of which they form as an integral part without prior approval by The Engineer.f. Curing of al concrete surfaces shal be approved by The Engineer.g. All concrete shall be "Normal Weight" concrete with approximately 2.3 T/m3 of the unit weight and shal be ready-mixed concrete.h. Cement shall be ordinary portland cement conforming to ACl or approvedequal.i. Recommended slump shall be as follows Other than this requires, approved by The Engineer.a. Concrete Bored PileMax. 20 cm ; Min 16 cmb. Columns, Shear Walls and Basement WallsMax. 17 cm ; Min 13 cmc. Raft, Pile Caps and FoundationMax. 14 cm ; Min 10 cmFront setting: editing moded. Beams and SlabsMax. 14 cm ; Min 10 cmComment object or 'Abandon/Mode':