080 off site manufacture (1)

OFF-SITE OFF-SITE MANUFACTUREMANUFACTURE

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Benefits of off site Benefits of off site manufacturemanufacture

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Benefits of off site Benefits of off site manufacturemanufacture

Benefits of off site Benefits of off site manufacturemanufacture

Benefits of off site Benefits of off site manufacturemanufacturePanelised timber frame system.The Advanced Hybrid Panel.Timber Frame Wall.„„ Brick facing.„„ Panel includes first fix

carpentry, insulationVapour control layer.

Benefits of off site Benefits of off site manufacturemanufactureBenefits„„ Reduced off cuts and site waste.„„ Reduced defects.„„ Factory quality control.Improved waste management.„„ Good levels of thermal efficiencyAir tightness on APS site much

better.

Benefits of off site Benefits of off site manufacturemanufacture

APS construction APS construction processprocess

Substructure

Substructure-Substructure-

Erect timber frame

Benefits of off site Benefits of off site manufacturemanufacture

Internal wall studwork

Benefits of off site Benefits of off site manufacturemanufacture

Technical details of the product

Benefits of off site Benefits of off site manufacturemanufacture

Benefits of off site Benefits of off site manufacturemanufacture

Benefits of off site Benefits of off site manufacturemanufacture1) Cutting timber to make up frames.

Timber makes the panel.The studs tend to be the same

length but horizontal plates vary.For this reason there are quite a

few untreated timber off cuts produced at this stage.

2) Automated milling2) Automated millingout of building openings.out of building openings.

This is the largestThis is the largestproducer of waste timberproducer of waste timberas currently whole sheetsas currently whole sheetsare attached to eachare attached to eachside of the frame and theside of the frame and theopenings are then cutopenings are then cutout, leaving regular sizedout, leaving regular sizedpieces of Orientatedpieces of OrientatedStrand Board (OSB).Strand Board (OSB).

Benefits of off site Benefits of off site manufacturemanufacture3) Insulation.There is very little wasteof the actual insulationmaterial itself, butpackaging is disposed of.

Benefits of off site Benefits of off site manufacturemanufacture

4) Shrink wrapping.Finished frames are shrinkwrapped to protect themduring transportation.As frames are differentshapes there are alwaysoff cuts.5) Structural I-Joists.There are off cuts ofI-joists created frommaking the floor cassettes.

Benefits of off site Benefits of off site manufacturemanufactureThe APS semi closed timber frame

systemrequires an average 27% fewer man

hoursduring construction than the brick andblock example.

This is because most of thesuperstructure construction for APS is

Benefits of off site Benefits of off site manufacturemanufactureAPS research resultsperformance breakdown(man hours on site)Total average man hours to

construct 100m2floor area: APS - 875.57Brick and block - 1204.1

Benefits of off site Benefits of off site manufacturemanufactureOn site performance and efficiency,

APS compared with traditionalThe proportion of non added

value time on APS is 9%Which is lower than the average

proportion of 12.5% recorded on numerous sites by BRE using CaliBRE.

Benefits of off site Benefits of off site manufacturemanufactureThis highlights that the APS

system has been used efficiently on Jocelyn Park.

On the SmartLIFE site using the brick and block system, the efficiency was affected by design changes requiring remedial work.

Benefits of off site Benefits of off site manufacturemanufactureThe challenges of urban construction

Construction on confined urban sitesPresents

developers with various challengesincluding:

the lack of working and storage space

Benefits of off site Benefits of off site manufacturemanufacturethe need to minimise the impact of all aspects of the construction work on the local residents the shortage of skilled labour for site construction.

Benefits of off site Benefits of off site manufacturemanufactureRecent experience with modern methods of construction has demonstrated that these challenges can be met by replacing a high proportion of site-intensive activities with off-site manufactured components.

Benefits of off site Benefits of off site manufacturemanufactureFor example, two dimensional panels and three dimensional modules are delivered on a ‘just-in-time’ basis to suit local conditions and require no storage space on site.

Benefits of off site Benefits of off site manufacturemanufactureOff-site construction is significantly

faster than traditional construction. This was an important factor in the

construction of three schools in Crawley.

These schools had to be built to a tight timescale to enable them to open in time for the new school term.

Benefits of off site Benefits of off site manufacturemanufactureThis meant slashing the

programme from 76 to 54 weeks.This represents a reduction in the

total construction period of 29%, which agrees well with a time saving of 25% .

Benefits of off site Benefits of off site manufacturemanufactureThe decision to include glazed

windows in the prefabricated wall panels was central to this achievement, as it permitted the speedy creation of a weathertight building envelope, thereby allowing other trades to work inside the building.

Benefits of off site Benefits of off site manufacturemanufactureSite activity and transport of labour

Commercial vehicle movements

WasteRequirements for working and storage space

Case study 2 – Lingham Court, Case study 2 – Lingham Court, Stockwell, LondonStockwell, London

Benefits of off site Benefits of off site manufacturemanufactureKey FeaturesThree blocks of 4 to 7 storeys.Residential with retail outlet.Lightweight for building over an

underground railway line.Mixture of light steel panels andpods.

Benefits of off site Benefits of off site manufacturemanufactureCurved façade with a variety of

cladding types.Limited storage and working space.Delivery of pods and panels timed

to avoid peak traffic periods.Finally-Benefits of off site

manufacture Is huge-look at off-site articles and

PPT