A bracket is designed with a pin-pin horizontal tie rod supporting a boom that is also pinned at two points. The boom is subjected to a steady vertical load of 6 kN, and the tie rod is made of steel with a tensile yield strength of 400 MPa. (a) Find the factor of safety against yield of the tie rod. (b) If each end of the tie rod is fastened with a 10 mm diameter pin in single shear, find the factor of safety against pin yield if the pins are made of the same steel as the rod. 12 mm diameter tie rod 45 deg. 6 kN 0.7 m 1 m Fig. 2

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Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing.