Load Charts are intended for preliminary design only.
Max tension allowed under full loading = 850 psi, therefore, additional top reinforcement is required.
Design criteria ACI 318-02.
Concrete strength at 28 days (f`c) = 6000 psi.
Design charts assume simple span.
Safe loads shown include 50% dead load and 50% live load.
Deflections must be checked according to design criteria.