determine the member sizes for the top and bottom chord members of the 8.8 m span parallel chord truss shown in above, which is carrying a medium-term UDL of 6 KN/m applied to the top chord by joisting at 0.6m centres. Use C24 timber in service classes 1 and 2. Neglect dead weight of truss. The top and bottom chords are spaced 1.8 m vertically apart on centrelines and are twin members. The diagonals are twin members, and the verticals are single members. The spacing of each bay is 2.2m

Please solve this question queckly

a) Write and explain one advantage and onedisadvantage of using intermediate stiffeners in plate girders. b) If a plate girder design was initially determined to require intermediate stiffeners, but one optedtonot use them, how else could the plate girder be designed to achieve the same shaer capacity.  c) A w-shepe beam is bent in bi-axial bending. All loading passes through its shear center. Please explain why the flexural  strenght about its weak axis is the fullplastic moment capacity regardless of Lb