(a)(it) Reinforced cement concrete in slab of rafts I strip foundation, base slab of column and retaining walls; etc and other structural members other than those mentioned in 5(a) (i) above not requiring form wort< (i.e. horizental shuttering) complete in all respects;- (2) Type B (nominal mix 1: 11/2: 3) (Shall have minimum compressive cylinder strength of 14MPa/ 2000psi at 28 days)