Question:
A simply supported wood beam AB with span length L=4m carries a uniform load of intensity q= 7 KN/m (see figure).
(a) Calculate the maximum bending stress due to the load q if the beam has a rectangular cross section with width b=120 mm and height h=240 mm.
(b) Repeat part (a) but use the trapezoidal distributed load shown in the figure part b.