Depends on what you are designing for.  There are seismic drift limits in the IBC code.  Design guide 3 is for serviceability and yes it is very hard to read.  Pre-Engineered metal buildings are allowed a limit of L/120 regardless of cladding, which I think is a political thing...lobbyists and all for the metal building association.  If you have masonry veneer, then you should use somewhere between L/600 and L/480.  A masonry association recommends L/730, but that gets a little crazy.  I would use design guide 3 except I would use the masonry veneer limit above.  Another thing you can consider is you wind speed.  It is based on a 50yr occurrence.  Who cares if your brick cracks a little in 50 yrs.  You can adjust your serviceability design wind speed by converting it to a 10 yr wind speed and reduce your wind speed by around 30%.  The conversion chart is in the back of ASCE 7.  Makes a pretty big difference if you can't meet your serviceability drift limit.  You still want to set your strength limit using the standard wind speed.