In the figure, find the length c of the overhangs so that the beam made of U profile can carry the loading safely. The safety stress (σç)emn=50N / mm2, (σb)emn=80N /mm2 for the tensile and compression condition of the material. The support range of the beam is L=6 m, cross-section dimensions a=210 mm, b=150 mm and wall thickness t=40 mm. The loading condition is P=30kN and q0=40 kN/m.
Extracted text: P uin B 不 a (section ) N