sheathing width

Somewhere I recall seeing something on the minimum width of OSB on 24" trusses. I cannot find any hardcopy on this. I know you guys can help me out.:shock:

DSC00658-220.jpg

As I recall 8" without additional support but didn’t look and the family has arrived

http://www.apawood.org/level_c.cfm?content=pub_osb_libmain

Thanks for the link. It states 24" minimum width. Clearly more than the photo shows.