A beam of rectangular section, 200 mm x 400 mm carries a uniformly distributed load of 30kN/m over the whole span. Find the maximum bending stresses at mid-span and at quarter span points. A timber...

A beam of rectangular section, 200 mm x 400 mm carries a uniformly distributed load of 30kN/m over the whole span. Find the maximum bending stresses at mid-span and at quarter span points.

A timber beam has to carry a load of 2kN/m over a span of 3 m. The permissible stresses are 12 MPa in compression and 8 MPa in tension. Design the section if the width is half of the depth.