A wooden joist of rectangular cross-section spans a gap of 5.0 m. The joist has a depth of 200 mm. Calculate the minimum width of joist required if the maximum tensile stress that the beam can be...

A wooden joist of rectangular cross-section spans a gap of 5.0 m. The joist has a depth of 200 mm. Calculate the minimum width of joist required if the maximum tensile stress that the beam can be allowed to withstand is 14 MPa and the load to be carried is a centrally placed one of 20 kN.