Not required., Resilient bar one side., Resilient bar two sides.
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Fire separation
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Cavity fire barriers
Not required., Gyproc Firestrip.
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Linings
Siniat 12.5 mm Fire Board two layers., Siniat 12.5 mm Fire Board three layers., Siniat 12.5 mm Fire Board four layers., Siniat 15 mm Fire Board two layers., Siniat 15 mm Fire Board three layers., Siniat 19 mm Fire Core Board four layers.