1. ACI 318-95. Building code requirements for reinforced concrete. Detroit, Michigan: American Concrete Institute; 1995
2. BS 8110-1:1997. Structural use of concrete. London: British Standards Institute; 1995
3. SABS 0100-1:1992. The structural use of concrete. Pretoria: The Council of the South African Bureau of Standards; 1992
4. Reinforced concrete design;Wang,1973
5. MacGregor JG. Reinforced concrete mechanics and design. 2nd ed. New Jersey: Prentice-Hall; 1988