2. The 150x250 mm timber beam has been strengthened by bolting to it the steel reinforcement shown. The modulus of elasticity for Knowing that the beam is bent about a horizontal axis by a couple of moment M = 50 kN-m, determine the maximum stress in wood and in steel. wood is 12 GPa and for steel 200 GPa. 150 mm 250 mm 125 X 12 mm

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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.