| 摘要 |
A duct (1) is protected against the effects of internal or external fires by a support structure (2) provided about the duct (1) along its length which supports sheets (8) of a fire resistant material. Thermal insulation can be provided between the support structure (2) and the duct (1). Support (2) may be in the form of a plurality of sets of channel members spaced apart around the duct and extending along its length with sheets (8) engaging with the members. Sheets may be of Fyreline 19 (RTM). Duct is typically a cable tray, service shaft or ventilation duct <IMAGE> |
