081 off site manufacture (2)

OFFSITE OFFSITE MANUFACTUREMANUFACTUREPRECAST FRAMESPRECAST FRAMES

[email protected]://www.construction-productivity.co.ukhtt://www.construction-productivity.co.uk

mailto:[email protected]

OFFSITE OFFSITE MANUFACTURE(OSM)MANUFACTURE(OSM)


Categorisation of OSMCategorisation of OSMVolumetric systemsVolumetric systemsMajority of factory-based form of Majority of factory-based form of

production, volumetric systems production, volumetric systems involve three dimensional modules involve three dimensional modules that can be used in isolation or in that can be used in isolation or in multiples to form the structure of the multiples to form the structure of the building. building.


These modules can be pre-These modules can be pre-finished in the factory.finished in the factory.

They include all fixtures and They include all fixtures and fittings, requiring a very limited fittings, requiring a very limited amount of installation work on amount of installation work on site.site.


Open panel systemsOpen panel systemsOpen panel systems are typically Open panel systems are typically

delivered to the site purely as a delivered to the site purely as a structural element with services, structural element with services, insulation, cladding and internal insulation, cladding and internal finishes installed in situ.finishes installed in situ.


Closed panel systemsClosed panel systemsThese are similar to open panel systems These are similar to open panel systems

in that the structural elements of the in that the structural elements of the building are delivered to the site in flat building are delivered to the site in flat panels.panels.

Closed panel systems include more Closed panel systems include more factory based fabrication such as lining factory based fabrication such as lining materials and insulation. materials and insulation.


It may also even include:It may also even include:CladdingCladding internal finishesinternal finishesServicesServicesdoors and windowsdoors and windows


Hybrid systemsHybrid systemsA combination of volumetric and panelised A combination of volumetric and panelised

systems.systems.The high value areas such as kitchen and The high value areas such as kitchen and

bathroom are typically formed from bathroom are typically formed from volumetric units.volumetric units.

The rest of the structure formed from The rest of the structure formed from some form of framing system.some form of framing system.

OFFSITE MANUFACTUREOFFSITE MANUFACTUREUK’s off-site manufacturing (OSM) UK’s off-site manufacturing (OSM)

industry in relation to the supply of OSM industry in relation to the supply of OSM components for housing.components for housing.

Almost any component can be Almost any component can be manufactured off site.manufactured off site.

Reinforced concrete columns (circular or Reinforced concrete columns (circular or square) with a smooth even surface ready square) with a smooth even surface ready for direct decoration. for direct decoration.

OFFSITE MANUFACTUREOFFSITE MANUFACTURE


Beams and floorBeams and floorLike the other structural elements beams Like the other structural elements beams

and floors. and floors. Units can be designed to meet client’s Units can be designed to meet client’s

requirements making provision for requirements making provision for services or features that will be services or features that will be incorporated during manufacture.incorporated during manufacture.

OFFSITE MANUFACTUREOFFSITE MANUFACTUREParapets are often a very visible element Parapets are often a very visible element

of the structure making their aesthetic of the structure making their aesthetic appeal as important as their structural appeal as important as their structural integrity.integrity.

Barriers can be supplied with a variety of Barriers can be supplied with a variety of attractive concrete finishes or designed to attractive concrete finishes or designed to allow materials used elsewhere in the allow materials used elsewhere in the structure, such as brick or stone to be structure, such as brick or stone to be incorporated.incorporated.


Double Tee BeamsDouble Tee BeamsProviding a lightweight solution for long Providing a lightweight solution for long

spans;spans;Double tee beams can reduce the number Double tee beams can reduce the number

of columns needed which is ideal for car of columns needed which is ideal for car parks and offices.parks and offices.

Using steel moulds for a smooth, even Using steel moulds for a smooth, even finish Double Tee Beams are finish Double Tee Beams are manufactured to BS8110.manufactured to BS8110.


Using concrete structuralUsing concrete structuralelements offers:elements offers:fast track, off-site fast track, off-site

construction, even for large construction, even for large structures.structures.


Coffered Flooring UnitCoffered Flooring UnitThese carefully detailed units provide a These carefully detailed units provide a

flooring slab incorporating a finished flooring slab incorporating a finished ceiling.ceiling.

The units can be manufactured to the The units can be manufactured to the designer’s specification incorporating designer’s specification incorporating whatever details are required.whatever details are required.

Ground BeamsGround Beamsconcrete beamsconcrete beams

provide a strong, durable structural element capableprovide a strong, durable structural element capableof providing many years of of providing many years of trouble free servicetrouble free service

Wall PanelsWall PanelsPrecast wall panels are manufactured to client'sPrecast wall panels are manufactured to client's

specification. They are suitable for use in multi-storeyspecification. They are suitable for use in multi-storeyconstruction and when combined with precast floorsconstruction and when combined with precast floors

allow a building to be erected very quicklyallow a building to be erected very quickly

Terrace units can be used anywhere were Terrace units can be used anywhere were banked seating is required from stadia to banked seating is required from stadia to

concert halls.concert halls.

Lift ShaftsLift Shafts

OFFSITE MANUFACTUREOFFSITE MANUFACTUREManufactured off-site in bespoke moulds Manufactured off-site in bespoke moulds

and installed quickly and efficiently by the and installed quickly and efficiently by the specialist installation teams.specialist installation teams.

Rigorous quality control will ensure that all Rigorous quality control will ensure that all components are accurate, eliminating components are accurate, eliminating problems on site.problems on site.

OFFSITE MANUFACTUREOFFSITE MANUFACTUREEvery bridge is unique and will require a Every bridge is unique and will require a

design solution developed to meet all of design solution developed to meet all of the requirements of the project.the requirements of the project.

From the ground conditions and From the ground conditions and specification of the bridge to the logistics specification of the bridge to the logistics dictated by the site and the potential dictated by the site and the potential disruption of such a major project.disruption of such a major project.


AdvantagesAdvantagesOff-site construction allows the build Off-site construction allows the build

process to run concurrently can equate to process to run concurrently can equate to as much as 60% reduction in programmeas much as 60% reduction in programme

Off-site construction offers improved Off-site construction offers improved building quality due to the controlled building quality due to the controlled construction environment i.e. factory finish construction environment i.e. factory finish and turn-key solutionand turn-key solution

Cost certainty for ClientCost certainty for Client

OFFSITE MANUFACTUREOFFSITE MANUFACTUREReduced waste (off cuts, packaging etc) – Reduced waste (off cuts, packaging etc) –

new legislation in the UK forces new legislation in the UK forces construction clients, designers and construction clients, designers and contractors to adopt a more sustainable contractors to adopt a more sustainable approach to waste.approach to waste.

Off-site construction facilities are enclosed Off-site construction facilities are enclosed and secure protecting against weather and secure protecting against weather damage and delaysdamage and delays

as well as theft.as well as theft.

OFFSITE MANUFACTUREOFFSITE MANUFACTUREPermanent, long term employment for Permanent, long term employment for

skilled labour both within the factory and skilled labour both within the factory and engineers on site.engineers on site.

Improved Fire/Acoustic performance Improved Fire/Acoustic performance (effectively two walls between all rooms (effectively two walls between all rooms with a cavity)with a cavity)

Improved Thermal EfficiencyImproved Thermal Efficiency

OFFSITE MANUFACTUREOFFSITE MANUFACTURESafetySafetyReduced number of workers/man hours on Reduced number of workers/man hours on

sitesiteWorkers have a reduced number of tasks / Workers have a reduced number of tasks /

hazardshazardsSystem building allows detailed analysis of System building allows detailed analysis of

risks at each stagerisks at each stageLess noise, dust and general disturbanceLess noise, dust and general disturbanceFewer commercial vehicle movementsFewer commercial vehicle movements


DisadvantagesDisadvantagesEconomically efficient for repetitive floor Economically efficient for repetitive floor

plates onlyplates onlyMost off-site modular systems are limited Most off-site modular systems are limited

to low-rise due to structural stability of to low-rise due to structural stability of modulesmodules

OFFSITE MANUFACTUREOFFSITE MANUFACTUREModules are limited in size by transport Modules are limited in size by transport

legislation and width of delivery vehicleslegislation and width of delivery vehiclesPreferred sizes (but larger sizes /heights Preferred sizes (but larger sizes /heights

are common)are common)-Width 4.0m outer face of floor steel-Width 4.0m outer face of floor steel- Length 10.6m outer face of floor steel- Length 10.6m outer face of floor steel- Height 2.8m floor to floor- Height 2.8m floor to floor

OFFSITE MANUFACTUREOFFSITE MANUFACTUREDesign freeze required early in the project.Design freeze required early in the project.VMS System is 18 weeks prior to VMS System is 18 weeks prior to

scheduled delivery on site.scheduled delivery on site.Size of crane required to lift modules may Size of crane required to lift modules may

not be cost effective with smaller not be cost effective with smaller quantities’quantities’

OFFSITE MANUFACTUREOFFSITE MANUFACTURETransportation can be costly if site is Transportation can be costly if site is

remote, significant distance from factory remote, significant distance from factory and if loads are wideand if loads are wide

No flexibility or option for future adaptationNo flexibility or option for future adaptation

081 off site manufacture (2)

Engineering