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421. <br /> Pressure. (dead) toad per ft (w) • (1.4)290(144) • SSW lb/ft <br /> Maximum bending moment (Mu) - wl'/s (10) <br /> P • S8464(102)/8 - 730.800 ft-lb <br /> Nominal design bending mommt adjusted for.capacity reduction factor of 0.66 <br /> is: <br /> • 730W/0.65 • 1.124.308 ft-lb <br /> Maximum flexural stress (psi) - Ma/S (11) <br /> S - section modulus (ia•3) <br /> Section modulus (ia 3) • I/C (12) <br /> i • moment of inertia (ia 4) <br /> C - centroidal.distame,ji$-) <br /> Moment of inertia (ia 4) - bh3A2 (13) <br /> b - beam width (in.) ' <br /> b - bean depth (in.) . <br /> Centroidal distance On-) - h/2 (14) <br /> ereforc flexural stress (psi) - Ma/S - Ma/[(bh3/12)/(h/2)] <br /> lb e <br /> ft - I6) 2 (15) <br /> j LNpired length (h) of plain concrete bulkhead. obtained by solving equation <br /> (1s) for the beam depth (h)q bulkhead length: <br /> -10. <br />