Thanks for those replies.
blup & gonch69 - Yes, figured the middle binder was there for a reason, but was thinking Options 1 & 2 would fulfuil the same purpose restraint wise?
cdbe - Thanks. Ok that's option 3 out of the question then. Still leaves a 3.6m span to the right which seems a lot...
Hopefully someone can offer some advice on this. I want to board the central area of my loft. 2.6m width by 6m length. Ceiling joists are 3x2 so on the weedy side. Supported by 2 5x2 binders running the 6m length which are supported on masonry. head height is at a premium so I don’t want to...