How to form door openings over 1200mm wide | British Gypsum

This video demonstrates how to form door openings over 1.2 metres wide to 3.3 metres, and over 3.3 metres wide to 3.6 metres.
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[@danielmcmullen871]

Hi BG
Does the cloaking track on a door opening wider than 1201mm have to be 72 DC 60 or is 72 FEC 50 sufficient??