Figure 1 shows the cross section of a steel plate girder of Grade 300 steel. The yield stress ofthe web is f = 310 MPa. (a) Determine the design shear

capacity of the unstiffened plate girder web. (b) Determine the design shear capacity of the stiffened plate girder web if intermediate transverse stiffeners are spaced at 1800 mm. (c) Determine the design shear capacity of the end panel of the welded stiffened plate girder if the width of the end panel is 1800 mm and there is no post. (d) Check the adequacy of a pair of intermediate transverse web stiffeners 100x16 mm of Grade 300 steel for the plate girder. The intermediate stiffeners are spaced at 1800mm. The flanges of the girder are not restrained by other structural elements against rotation. The yield stress of the stiffeners is fy = 300 MPa. O Check the adequacy of a pair of load-bearing stiffeners 100x16 mm of Grade 300 steel which are above the support of the plate girder. The flanges of the girder are not restrained by other structural elements against rotation. The girder is supported on astiff bearing 300 mm long. The end panel width is 1000 mm and the design reaction is1400 kN. The yield stress of the load-bearing stiffeners is f, = 300 MPa