"Hanging Curtain Wall"

I put the subjec in quotes b/c I wasn't sure exactly what to call it. I am working on light gage framing for a divider that will be hanging from a structural steel frame above. The divider is in the interior of a very large church. I'm considering the divider as an upside down cantilever wall. What deflection limits or where could I find them should I use for this divider. What nominal lateral design load would you design for (All of these are on the interior of the building)? Thank you.