[PDF] technical manual - Firesafe Fire Rated Ductwork
Protection using Fire and Smoke Dampers (automatically actuated via .... Fire Protection includes fire alarm systems, heat / smoke detectors, sprinkler ... High - Class D - Up to 2000Pa positive or 750Pa negative / Very Low Leakage ..... Do the drop rods need to be spaced further away from the body of the duct than usual?
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firesafeductwork's website is firesafeductwork.co.uk