Figure P-130 shows a roof truss and the detail of the riveted connection at joint B. Using allowable stresses of 70 MPa and 140 MPa, how many 19-mm diameter rivets are required to fasten member BC to the gusset plate? Member BE? What is the largest average tensile or compressive stress in BC and BE? 14 mm gusset plate 4m 4m 4m 75 x 75 x 13 mm 96KN 200 96KN 75 x 75 x 6mm Figure P-130 and P-131