1- Concrete of min. 28 days cylinder crushing strength of 3000 psi (Shall conform to the relevant item in specifications provided with these drawings) Shall be used in the construction of all the structural members including foundation Footing, foundation beams, floor slabs, beams, columns, stairs, slab etc.
2- Reinforcing bars used in structural members shall be of min. Yield strength of 40,000 psi Confirming to ASTM a-615.
Standard bar cut off point
1- Standard bar cut off point for the negative reinforcement bars shall be at distance of one-third of the clear span length (between the supports)from the face of the support (l/3).
1- Hooks used for longitudinal tensile steel reinforcement bars shall be of 90 degrees (right hook) with an extension of at least 12 bar diameter at the free end of the bar and with a min.
2- For all stirrups and tie bars 90-degree hooks shall be used with an extension of at least 6 bar diameter at the free end of the bar and with a min. The diameter of the bend of 6 bar diameter shown in the figure below.