Unitised curtain wall facade The curtain walling was supplied in a variety of polyester powder coat and anodised colours. The spandrel panels span over element stack joints to disguise the floor plate positions and give a ‘random’ appearance. The fully unitised, bespoke curtain wall elements, typically 1.5 m wide by 3.95 m high, were manufactured off-site at Lindner Group Head Quarters in Arnstorf, Germany and delivered to site by road. The main envelope installation was achieved using a pre-fabricated and pre-glazed unitised form of construction and without the need for costly scaffolding. Elements were installed using our own floor cranes and the “Table Method” as shown below.
Facade types and scope Design, manufacture and installation of 20,800 m² of bespoke cladding systems including: – 18,900 m² unitised facade – 1,500 m² aluminium rainscreen panels – 400 m² cladding – 225 mm deep vertical aluminium fins to main facade – Smoke clearance vents – Glazed and aluminium panel plant screens at roof level – Copings, soffits, cills – Main entrance area glazing and doors
Facade performance – Watertightness: 600 Pa – Air permeability: 600 Pa – Thermal insulation curtain wall (typical): Ucw 1.8 to 2.2 W/ m²K – Thermal insulation glazing: Ug 1.1 W/ m²K – Solar shading / glazing g value: 0.26 – Light transmission: 48 % – Thermally broken system – Capped / gasket glazed design with 3 different glazing bead depths – Large vertical feature fins fixed to element mullions – Smoke clearance vents
A particular architectural requirement of the facade design is the spandrel panels which over-sail the element stack joints to disguise the floor slab positions. Enlarged vertical section through stack joint and vertical fin. Enlarged horizontal section through element joint and glazing. The system is gasket glazed and thermally broken to improve insulation of the facade. Three lines of gaskets provide excellent air and water tightness. Elements are dead load supported from brackets mounted on the floor slabs. Wind restraint is achieved by steel plates known as swords which penetrate from the head of the lower element into the mullions of the element above. Vertical feature fi ns are supported on local brackets fixed to the mullions. Typical opening vent section and elevation. Enlarged section through opening vent. Top hung, open out smoke clearance vents were incorporated into the atrium facades.
Project Facts: 14 Pier Walk and 6 Mitre Passage, Peninsula Place, Greenwich, London Client: Greenwich Peninsula Regeneration Developer: Lend Lease and Quintain joint venture Main Contractor: Bovis Lend Lease Project Architects: Terry Farrell and Partners Facade Engineers: Rambolls and Hilson Moran Completion date: 2010
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