A beam is fabricated from 150mmx250mm oak timber and two 150mm x 25mm aluminum face plates. If the fibre stresses in aluminum and in the wood are not to exceed 10 MPa and 42 MPa respectively, calculate the maximun moment the section can resist. E(aluminum)=70GPa and E(oak)=14 GPa what will be the moment carrying capacity of a simple oak beam that has 150mm wide and 400mm deep? Use E(oak)=14GPa Solution.