presented by: joe martin, bcis executive director
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Standard Forms of Elemental Cost Analysis for Civil Engineering COBRA, Las Vegas, 11-13th September 2012. Presented by: Joe Martin, BCIS Executive Director. Building Cost Information Service of Royal Institution of Chartered Surveyors Online database of elemental cost analyses for buildings - PowerPoint PPT PresentationTRANSCRIPT
COBRA, Las Vegas, September 2012
Standard Forms of Elemental Cost Analysis for Civil EngineeringCOBRA, Las Vegas, 11-13th September 2012
Presented by: Joe Martin, BCIS Executive Director
COBRA, Las Vegas, September 2012
Building Cost Information Serviceof Royal Institution of Chartered Surveyors
Online database of elemental cost analyses for buildings• 17,000 buildings• Data for:
– Business case/early cost advice– Budget setting– Benchmarking
• Standard elemental data structure
COBRA, Las Vegas, September 2012
COBRA, Las Vegas, September 2012
Cost analyses
BCIS Standard Form of Cost Analysis• ‘Purpose of cost analysis is to provide data that allows
comparisons to be made between the costs of achieving various building functions in a project with those of achieving equivalent functions in other projects.’
COBRA, Las Vegas, September 2012
Element
Element:A major physical part of a building that fulfils a specific
function or functions irrespective of its design, specification or construction.’
COBRA, Las Vegas, September 2012
The elemental approach has been taken up as a framework for:
• Client brief• Cost analysis and benchmarking• Cost modelling• Cost planning• Lifecycle costs• Procurement • Performance specification; and• Value engineering
COBRA, Las Vegas, September 2012
The application of Elements is seen around the world. Many developed countries have their own classification of Elements.
In America there are:• ASTM UNIFORMAT II• CSI/CSC UniFormat• Omniclass Table 21• CIQS Elemental Cost Analysis
COBRA, Las Vegas, September 2012
But there are no widely used standard elements for Civil Engineering structures
COBRA, Las Vegas, September 2012
Objective
Project with UK Defence Infrastructure Organisation (DIO)
‘To collate cost data on civil engineering schemes in a consistent format that can
be used for benchmarking and future cost estimates’
COBRA, Las Vegas, September 2012
COBRA, Las Vegas, September 2012
Uniclass
UniclassUK United Classification for the Construction
Industry: 1997:
Table E Construction entities
Table H Elements for civil engineering works
COBRA, Las Vegas, September 2012
ISO 12006-2
ISO 12006Building Construction-Organisation of information about
construction worksPart2:Framework for classification of informationProposes tables for:
– Entity (by Form)– Elements
COBRA, Las Vegas, September 2012
Entities: a building
COBRA, Las Vegas, September 2012
A house is a building
COBRA, Las Vegas, September 2012
A hospital is a building
COBRA, Las Vegas, September 2012
A hotel is a building
COBRA, Las Vegas, September 2012
My shed is a building
COBRA, Las Vegas, September 2012
A building
• A hospital is a building• A house is a building• A hotel is a building• My shed is a building
They all provide: structurally supported, enclosed, usable, floor space
COBRA, Las Vegas, September 2012
A building
All buildings have a common function independent of their use.
Object function – building ie structurally supported, enclosed, usable, floor space
User function – hospital (ie healthcare)
User function = Entity type
COBRA, Las Vegas, September 2012
Entities
Entities = structures with common object functions
Entity: an independent construction of significant scale classified by its physical form/basic function (Uniclass)
Therefore we are looking for Entities i.e. civil engineering structures with common ‘Object Functions’ as these will, hopefully, have common elements.
COBRA, Las Vegas, September 2012
Entities
PavementsRailways (trackways)Platforms, quays, piers and jettiesRetaining structureDividing structuresSupport structures (masts and towers)PipelinesOpen conduitsBridges (spanning structures)Tunnels…
COBRA, Las Vegas, September 2012
BCIS SFCECA ASTM UNIFORMAT IIPavements and landscapingRailwaysPlatforms, quays, jetties and the likeRetaining structuresDividing structuresContainersSupport structuresPipelines and ductsOpen conduits CablesWellsGround contouringBridgesTunnelsOrnamental structuresMiscellaneous/unclassified projects
Transportation surfacesBridgesWaterfrontDam and CanalPipelinesWater and SewerageUnderground – TunnelStorage TanksCommunicationsPowerManufacturing and Processing
COBRA, Las Vegas, September 2012
Projects
• A project is a grouping of entities
COBRA, Las Vegas, September 2012
Project: Building and external works
Road
Building
Pipe Cable
Hard landscapeSoft landscape
COBRA, Las Vegas, September 2012
Project: Road and external works
Road
Building
PipeCable
Hard landscapeSoft landscape
COBRA, Las Vegas, September 2012
Costs Excluding preliminaries Cost including preliminaries
Total cost Cost per entity unit quantity
Total cost Cost per entity unit quantity
Entity analysed
Entity 2…
Entity …n
External works
Facilitating works
Preliminaries
Location related temp works
Contingencies
Contractor’s design fees
Project contract total
Client’s costs
Project total
COBRA, Las Vegas, September 2012
Entity Types• Each entity will have a range of ‘Entity Types’ that
define their user function, e.g. ‘Pavements’ may be used for runways, taxiways as well as various types of road, etc. It is proposed that the entity types will be defined based on Uniclass Table D – Facilities, where possible.
COBRA, Las Vegas, September 2012
Costs that are not attributable to the physical parts of the building should be analysed in to:
• Preliminaries• Main contractor’s overheads and profit• Contingencies and risks• Contractors design fees on design and build
contracts.For benchmarking rules are required for allocating
the non-elemental costs to ensure consistence of the data.
COBRA, Las Vegas, September 2012
Railway client consultation
London Underground Network Rail100 Trackwork 1.01 Permanent way
1.03 Level crossings
200 Buildings
300 Power supply 1.05 Electrification Contact systems
1.06 Electric power and plant
400-405 Bridges 1.08Civil engineering works (05 Bridges and viaducts)
406-408Retaining structures (cuttings, embankments, retaining walls) 1.08
Civil engineering works (02 Earthworks, 06 Retaining walls)
409-410 Drainage 1.08Civil engineering works (02 Earthworks, 08 General drainage)
412 Dividing structures 1.08Civil engineering works (07 Fencing and enclosures)
414-415 Tunnels 1.08 Civil engineering works (0.4 Tunnelling)
500 Signalling 1.02 Signalling equipment and systems
600 Communication 1.04 Telecommunications
COBRA, Las Vegas, September 2012
Possible SFCECA for Railways
Entity Railway
Trackwork
Level Crossings
Power supply
Electrification
Signalling
Communication
COBRA, Las Vegas, September 2012
Bridges
Uniformat II SFCECASubstructure SubstructurePiers Abutments
Towers Piers, towers and the like
Abutments Thrust blocks and anchorages
Superstructure Bridge deckShort Span Assemblies Deck structure
Long Span Assemblies Deck support
Deck Bearings
Edge treatment
Protection Bridge completionStructure Protection User installation (road, track, etc. if included with bridge)
Traffic Protection Drainage
Other Protection Services (lighting, power, water, etc)
Lighting Communications
Signage Protection and security
COBRA, Las Vegas, September 2012
Note: this slide has been stolen from Christophe Castaing (EGIS) and Pierre Benning (Bouygues Travaux Publics)
COBRA, Las Vegas, September 2012
Data model and IFC for Infrastructure
Note: this slide has been stolen from Christophe Castaing (EGIS)and Pierre Benning (Bouygues Travaux Publics)
COBRA, Las Vegas, September 2012
Standard Forms of Elemental Cost Analysis for Civil EngineeringCOBRA, Las Vegas, 11-13th September 2012
Presented by: Joe Martin, BCIS Executive Director