Problem $04\mathrm{.}037-$ Maximum bending moment in a wood$-$steel composite beam bent about a horizontal axis

Three wooden beams and two steel plates are securely bolted together to form the composite member shown. Using the data given in the table, determine the largest permissible bending moment when the member is bent about a horizontal axis. Take $x=8\mathrm{.}5$ in$.$

Wood

Steel

The largest permissible bending moment when the member is bent about a horizontal axis is

kip.in$.$