The initial design of the small bracket consisted on two plate, each 2
cm thick, one perpendicular to the bolt, the other parallel.  After
removing material where the stresses were particularly low, we noticed
that the two plates seem to bending away from each other when under
load (see figure). To alleviate this problem a cross-brace was added
connecting the welds C and D.  This new design concetrated the large
stresses to the region surrounding the bolt hole.  We could then
concentrate our detailed FEM on thickening the plate with the bolt
hole until the yield requirement was met.  The resulting bracket is in
figure ????.