MDX Software - FAQ #19<BR><BR>

How can a diaphragm brace be overstressed when it is 
connected to the connection plates with only a few bolts on the web? <BR>
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<UL>The program assumes full continuity between bracing and girders, which of course
  is appropriate for diaphragm bracing that is moment connected.  (This also is
  appropriate for cross frames because, even though the individual members are
  pin connected, the cross frame as a unit behaves as if it is moment connected.)
  The approach to representing diaphragm bracing as pinned connected to the girder 
  is to define the diaphragm bracing in terms of section properties (GROUPI and
  GROUPJ data) with near-zero values, say 0.01.</UL>