(Solved): H.W. A wood beam AB supporting two concentrated loads \( P \) has a rectangular cross section of wi ...

H.W. A wood beam AB supporting two concentrated loads \( P \) has a rectangular cross section of width \( \mathrm{b}=100 \mathrm{~mm} \) and height \( \mathrm{h}=150 \mathrm{~mm} \). The distance from each end of the beam to the nearest load is \( a=0.5 \mathrm{~m} \). Determine the maximum permissible value Pmax of the loads if the allowable stress in bending is \( \sigma=11 \mathrm{MPa} \) (for both tension and compression) and the allowable stress in horizontal shear is \( \tau=1.2 \) MPa