Facade replacement: Great Arthur House
The City of London Corporation needs an architect-led design team to advise on replacing the facade of Great Arthur House, located on the Grade II-listed Golden Lane Estate
The team will replace the existing curtain wall system and individual windows, upgrade timber balcony doors and fanlights, redecorate the exterior and make minor concrete repairs.
Expressions of interest must be made by 25 October.
Client contact details:
City of London Corporation
PO Box 270
Attn: Mr. Philip Walter
EC2P 2EJ London
Tel. +44 2073321034
The project as a whole comprises design and construction works to replace the existing aluminium curtain wall system (and may include structural strengthening, if deemed necessary as a result), replacement of separate individual windows, upgrade of timber balcony doors and fanlights, external redecorations and minor concrete repairs at Great Arthur House, a 16-storey 120-flat residential tower block which forms part of the Golden Lane Estate, London ECY. The City of London Corporation (the City) owns and has responsibility for the maintenance of the Golden Lane Estate (GLE), a residential development in its administrative area.
The GLE is Listed at Grade II and one of the blocks, Crescent House, is Listed at Grade II*. The GLE was constructed following an architectural competition held in 1951 which attracted 178 entries. The successful entry, by Geoffrey Powell, resulted in the partnership between Chamberlin, Powell and Bon who shared the GLE commission and who went on to design the Barbican Estate.
Great Arthur House is the first residential tower block in London to be built over 50 metres in height, and indeed the first to breach the 100 foot height limit in the City of London. It was, briefly, the tallest residential tower in England. Most of the residential blocks comprising the GLE are strongly horizontal structures, whereas Great Arthur House introduces a strong vertical counterpoint. It is the dominating structure of the GLE and can rightly be regarded as a landmark building. The GLE was constructed over a period of approximately 10 years, from 1953 to 1962, with Great Arthur House being completed in 1957. Approximately 38 % of the flats are owned under Long Leases, the remainder are occupied by Local Authority Tenants. The mix of occupiers (including a number of architects and other professionals) expect to be fully involved and consulted, and the City of London Corporation is committed to involving the residents affected whether as tenants or as owners. The City of London Corporation as Freeholder will need to be able to justify the approach taken to this project and the resulting costs to all its stakeholders, including the Long Leasehold residents who will be expected to pay for the works to their flats from their own resources.
Key project considerations, constraints and objectives.
The listed status of the building is a key consideration/constraint on the project – it will be essential to maintain, as far as possible, the current external appearance/compatibility with the original design intent albeit using modern approaches and materials to replace the existing facades which will need to be removed. Disruption to residents will need to be minimised, ideally by the use of pre-fabricated panels using a method of working whereby the existing cladding is removed and the replacement panel installed as soon as possible thereafter. Such an approach should reduce costs as well as inconvenience to residents.
The City has been advised that there is virtually no spare capacity at the floor edges of the building to support an increase in loading. One of the principal aims in the development of the technical design of the replacement curtain walling will be to adopt measures that would avoid the need for costly structural strengthening altogether. If, however, it is proved that structural strengthening is unavoidable, an appropriate and economic solution which minimises disruption caused to occupants must be devised. Replacement panels will obviously need to be designed to accord with the principles underlying the Listing of the building, which may impose some constraints, but this provides an opportunity for forward thinking and innovative approaches. Consideration should be given to incorporating an element of structural strengthening within the façade panels if this would provide the greatest benefits in terms of reduced costs and disruption to occupiers.
A method of working which renders full external scaffolding unnecessary, subject to the extent of the work identified, will help to reduce cost and overall contract programme.
For the purposes of this Contract Notice the City wishes to procure Consultancy Services only and to appoint Consultants for the whole design process and for the duration of the construction period from suitably technically qualified and financially sound consultants to provide the services as set out above and in Annex B (Lots) and who have experience of dealing with projects of a similar nature.Client and Project Management services will be provided by the City. Expressions of interest are invited from suitable candidates for two Lots: Lot 1 - Multi-disciplinary collaborative consultancy team; Lot 2 - Quantity Surveying consultancy. Suitable candidates may express an interest for one Lot only. Expressions of Interest for Lot 1 should be submitted as a single Expression, as detailed later in this Notice.
The selection criteria, as set out in the pre-qualification questionnaire (PQQ), will include a criterion that the successful consultants have appropriate experience of carrying out services of the kind being procured pursuant to this Contract Notice in a similar environment. The City reserves the right in its absolute discretion not to award any contract advertised pursuant to this Contract Notice or to award only a part or parts of any such contract.
The appointments encompass consultancy services for the whole design process and for the duration of the construction period in respect of the following project:
— Replacement of the existing curtain wall system (and structural strengthening, if any, of the building if deemed necessary as a consequence),
— Replacement of individual windows,
— Upgrade of balcony doors & fanlights over,
— Minor concrete repairs,
— External redecorations.
Expressions of interest are requested from suitable candidates for the following Lots and suitable candidates may express an interest for one Lot only. Client and project management services will be provided by the City. Lot 1 - Architect (Team leader & lead designer), Structural engineer, Environmental engineer (thermal calculations/modelling and limited M&E services), Façade Engineer/Specialist, CDM Co-ordinator and clerk of works (construction monitor and client & residents’ liaison). Lot 2 - Quantity Surveyor.