Just how important is the "oriented" part of OSB?
Professional roofer here, but with a framing(decking) question.
We just tore off the roof on a house that has a 5:12 apron around the perimeter, then transitions to a 10:12 pitch. But the 5:12 portion is 5 feet on the rake measurement. The decking is 4x8 7/16" OSB which is the standard here in Texas, and is laid with the long axis perpendicular to the rafters (so each sheet spans 4 rafter bays (24"OC). But that ends up leaving a 1' x 8' strip to fill the gap between that bottom sheet and the pitch transition. Those 1' strips are a pain, quite literally, if you forget momentarily and step on one especially when carrying a loaded belt and some materials.
There is no blocking under the joint, and no clips (I'm guessing because the clips break when bent and if they don't break then when one piece is stepped on and deflects, it just pulls the clip off the other piece.
I don't want to leave it this way. It's not safe or nice for the next guy. But I also really don't want to do all the blocking (it is a very large rambling ranch, so several hundred feet of this transition to deal with.
5x10 [re-]decking would be perfect, but it is astronomically expensive (i.e. 10x-15x the price). My initial thought was to replace the current setup with nre 4x8 but turned 90 degrees, so that the long axis runs parallel to the rafters. Each sheet would span two bays, so it would be nailed to 3 rafters. But I was told that code requires the sheets to be run perpendicular to the rafters (or floor joists, etc.) because the strands/chips are actually oriented that direction to give better strength (at the cost of weakening it if laid in the other (parallel) direction.
You guys should know this one, I figure. Can I run 5 feet of a 4x8 sheet vertically up the rafters (24"OC) ?