Existing concrete strength of 5000 psi
• Yield strength of existing steel 41,000 psi.
• The stress in the reinforcing bars of the terrace’s
parapet are 1,195 megapascals, or more than four
times the steel’s yield strength.
• Stresses of 288 megapascals in the steel of the
main cantilever beam and 30 megapascals in the
concrete. These stresses are at critical level and
they are just about the yield strengths of the
material