Given:
pretensioned rectangular beam b=6" h=20" f'c=4000psi f'ci=3000psi fti=.165ksi fts=.38ksi fci=1.8ksi fcs=1.8ksi R=0.80 Required:
(a)Pi and e to maximize Md+Ml without exceeding stress limits.
(b)Uniformly distributed load that can be carried on a 30ft span"