Fire resistant ventilation duct and a method of manufacturing and installing such ventilation duct
AssigneeRockwool A/S
InventorsKurt Munk Pedersen, Jürg Dieter Stefan Rödenberger, Markus Thoma
Life of this patent
Estimating the term…
Abstract
A ventilation duct for a fire rated ventilation duct wall penetration has one or more metal sheets forming said duct, wherein said metal sheet duct is covered on the outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets. The stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material. The metal profile is fixed to the metal sheet of the duct and retains the non-combustible bar by at least partly encircling the bar.
Claims31
A ventilation duct for a fire rated ventilation duct wall penetration, said ventilation duct comprising:
- one or more metal sheets forming said duct, wherein said metal sheet duct is covered on an outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets;
- wherein the stiffening members each comprise a metal profile and at least one non-combustible bar of inorganic material;
- and
- wherein the metal profile is fixed to the metal sheet of the duct and retains the at least one non-combustible bar by at least partly encircling the bar.
A method of manufacturing and installing a ventilation duct in a fire rated ventilation duct wall penetration, said method comprising the steps of:
- providing a ventilation duct section comprising one or more metal sheets forming said duct section;
- mounting elongated stiffening members located on an outside of the duct section and attached to said metal sheets, wherein the stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material, wherein the profile is fixed to the metal sheet of the duct section and retains the at least one non-combustible bar by at least partly encircling the bar;
- and
- positioning the ventilation duct section with stiffening members through an opening in a building structure;
- covering said metal sheet duct section and the stiffening members with the non-combustible bars by a heat insulating material;
- and
- sealing a gap between an outer surface of the insulation material and the opening in the building structure.
Dependencies are inferred from the claim text.