P.21.4 If the vertical plane of symmetry in the beam of P.21.3 is swept back by $25^\circ$ as shown in plan in
Fig. P.21.4, the span of 3 m is retained and the 40 kN load is applied as in P.21.3, calculate the flange
and stringer loads and the shear flow distribution at a section 1.5 m from the built-in end.
Answer: $P_1 = -P_2 = -147.3$ kN, $P_3 = -P_4 = P_5 = -P_6 = -73.7$ kN
$q_{12} = 141.6$ N/mm, $q_{56} = 23.1$ N/mm, $q_{13} = q_{42} = 82.3$ N/mm
$q_{35} = q_{64} = 52.7$ N/mm
FIGURE P.21.4
