For the frame shown above is constructed out of circular tubes for both the beam and column.  It has a height L = 4 m and a point load applied to the beam at a distance x = 1.1 m from the column. What is the maximum force P in kN that can be applied if the bending stress in the section below is to be less than or equal to 300 MPa

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Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.