I've always found it interesting that load duration is not factored into deflection requirements.
As I've understood it, something like a floor deflection limit is based more on human comfort and feeling the vibration of a floor. Deflection on a floor joist from a wind event is much less...
I am referencing the 2012 IBC but I have checked the commentary for the past couple code cycles and it was the same in each.
Table 1604.3 Deflection Limits
The commentary states "In computing deflections to verify compliance with Table 1604.3 limits, the loads shown in the column headings of...