7.3 Compute the development length required for the top no. 9 bars of a cantilever beam that extend into the column support if the bars are a. Straight b. Have a 90 hook at the end c. Have a 180 hook at the end fc The bars are confined with no. 3 stirrups spaced at 5 in. and have a clear cover of 2.0 in. Use = 4ksi and f = 60 ksi. (Clear spacing = 2.5 in.) 7.5 Repeat Problem 7.3 when fr = 3 ksi and f, = 40 ksi.