Hopefully I think I can recall correctly! EASIBUILD was the original Span System made by Youngman. It was 1.3m Wide and at 0.4m Span Centres ... that is a 2.0m High Frame had 5 x Cross Bars.NO Frames had any form of built in Ladder.
BOSS Span is 1.45m Wide and at 0.5m Span Centres....that is a 2.0m High Frame has 4 x Cross Bars. Frames are provided with Built in Ladders and to counter the deeper centres you need to build each Lift with an opposing Ladder Frame.
The only universal Brace was the Horizontal Hand Rail.
As you can obviously see the System Frames are not compatible. Lastly Easibuild is now quite a very old system and some form of ladder access is needed....
---------- Post added at 10:40 AM ---------- Previous post was at 10:36 AM ----------
Apologies... the DECKS (due to standard lengths) are still compatible ... but Manufactured totally different to each system... again reflecting the age of Easibuild.