Consider one wing aileron w/ rectangular planform. This aileron w/ constant chord has a span of 6 ft & a uniform spanwise air load distribution of 10 lbs/ft. It is supported by two hinges w/c are located at the tips of the span. The air loading is assumed to be transmitted to a single spar w/c is connected at the tips to the wing. The cross-section of the spar is constant throughout the aileron span & rectangular in shape measuring 12 inches high by 5 inches wide w/ a maximum allowable bending stress of 100 psi. Calculate the maximum bending moment; and the maximum flexural/bending stress.

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Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.