Ducts of metal for ventilating and air-conditioning installations; Metal building materials, namely, floor panels and fascia; Pipework of metal; Ventilating ducts of metal; Transportable buildings of metal; Pipework of metal including those from alloy steel and titanium; Ducts and pipes of metal for central heating installations; Portable metal buildings; Metal vent covers for roof deck protrusions, drains and pitch pans; Metal roof vents for ventilation in residential and commercial building...