The SE is wrong, plain and simple, it was all fine and dandy pre-Grenfell, an it'll do attitude sufficed, not any more.Want to tell the S/Es who specify this, then? We install to their written instructions, prepared drawings and GAs
BTW, ever tried fixing plasterboard to. Itself?
When timber battens are fitted to steel beams, in the event of a fire the timber behaves differently to the steel, it bows and bends and expands at a different rate, the metal fixings heat up and can char the timber where its screwed in losing their grip and consequently the boards can simply fall off or come away from the steel.
When I say plasterboard (which as mentioned should not be used on it's own) I'm referring to Glasroc Firecase boards which can be screwed to itself.