Replacement of Refuge Chute Extensions & Hoppers at Various site

London Borough of Hillingdon is seeking a contractor to - 1.1 To remove 76 x existing bin hoppers and 39 x chute shut off plates Install new chute extension with automatic fire shutter plate also incorporating manual shut off factuality for maintenance purposes. Shut off plates to connected to a fusible link. In case of excessive heat (or fire) the link gets fused at 165°F (68°C) causing the door to roll shut. 1.2 To install 76 Bin Hoppers and install 39 Chute shut off plates Please see attached documents for det...