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oea OCONNELL EAST ARCHITECTS
oeaOCONNELL EAST ARCHITECTS
Victoria Hall, Wolverhamptonand
Off-Site Modular Construction
Jenny Hayes
oea OCONNELL EAST ARCHITECTS
Victoria Hall, Manchester
Low Rise
Low Budget - £5.5M
Traditional Loadbearing Construction
Low Risk
Relatively High Returns
oea OCONNELL EAST ARCHITECTS
Blocks B & C - Material Treatment
Blue engineering brick at ground and first floor of all blocks
White acrylic render to upper floors of Blocks B, C & D with projecting frame detail linking bedroom windows.
Lounge bay window projections of dark grey metallic metal cladding incorporating colouredaluminium panels
Green metallic composite aluminium cladding
Fully glazed management suite and common rooms to give street presence and internal activity at ground and first floor levels
oea OCONNELL EAST ARCHITECTS
Block A – Articulation and Materials
Blue engineering brick at ground and first floor
Silver metallic and dark grey metal cladding to tower with horizontal joints.
Replicated lounge bay window projections of dark grey metallic metal cladding incorporating coloured aluminium panels used on Blocks B & C
Cantilevered elements to SE prominent corner
Glazed lift shafts and stair core landings
oea OCONNELL EAST ARCHITECTS
Fleming Proposals
Early Completion 2009 – 1 year early Reduced floor to floor height from 3075mm to 2800mm Fundamental change in overall super structure and foundation
design Provision of an additional 23 study rooms – primarily to provide
structural continuity but gave benefit to Client of additional revenue
Blocks B & C Relocation/configuration of ground and first floor common room/multi-use spaces and refuse stores
Incorporation of 1m deep transfer structures at 1st and 2nd floor levels
Investigate alternative cladding materials for Block A Block A – reconfigured floor plate due to the south-eastern
cantilever structures and reduced core structure
oea OCONNELL EAST ARCHITECTS
Off-Site Construction - Advantages
Off-site construction allows the build process to run concurrently can equate to as much as 60% reduction in programme
Off-site construction offers improved building quality due to the controlled construction environment i.e. factory finish and turn-key solution
Cost certainty for Client
Reduced waste (off cuts, packaging etc) – new legislation in the UK forces construction clients, designers and contractors to adopt a more sustainable approach to waste.
Off-site construction facilities are enclosed and secure protecting against weather damage and delays as well as theft.
Permanent, long term employment for skilled labour both within the factory and engineers on site.
Improved Fire/Acoustic performance (effectively two walls between all rooms with a cavity)
Improved Thermal Efficiency
Safety
- Reduced number of workers/man hours on site
- Workers have a reduced number of tasks / hazards
- System building allows detailed analysis of risks at each stage
Less noise, dust and general disturbance
Fewer commercial vehicle movements
oea OCONNELL EAST ARCHITECTS
Off-Site Construction - Disadvantages
Economically efficient for repetitive floor plates only
Most off-site modular systems are limited to low-rise due to structural stability of modules
Modules are limited in size by transport legislation and width of delivery vehicles
Preferred sizes (but larger sizes /heights are common)
- Width 4.0m outer face of floor steel
- Length 10.6m outer face of floor steel
- Height 2.8m floor to floor
Design freeze required early in the project. VMS System is 18 weeks prior to scheduled delivery on site.
Size of crane required to lift modules may not be cost effective with smaller quantities
Transportation can be costly if site is remote, significant distance from factory and if loads are wide
No flexibility or option for future adaptation
oea OCONNELL EAST ARCHITECTS
Off-Site Construction: Limitations
Block A To comply with the approved
scheme cantilever elements were retained to the SE elevation.
The internal room configuration was adjusted to provide some structural continuity together through the modules.
Barratt Mahony designed an additional structural H-frame to provide support to the underside of cantilevers.
Introduction of non-standard floor plates within modular construction can be costly.
oea OCONNELL EAST ARCHITECTS
Points to consider:
Are traditional and modular construction methods really that different?
Did working with an off-site supply chain help or constrain design and flair on the project?
What are the critical success factors for architecture and designer working with offsite?
Would we recommend off-site?
Limitations of off-site construction?