Many new homes around here have trusses 24 on center, most of the attic floors are double thickness OSB (7/16) when furnaces and water heaters are present.
Some have single 7/16 OSB spanning 24" where the attic is only for storage.
The access on all examples is folding stairs or ceiling scuttles.
The single layer 7/16 has a span limit of 16 inches.
Any difference in IRC code because this area is only for storage?
In other words, is 7/16 OSB ever allowed to span 24 inches when used in storage areas without regular access?