BIM And the cost of sustainability

January 2013BIM the cost of sustainability

BIMAnd the cost of sustainability

Delivering sustainability


Introduction

This is a case study of a PassivHaus primary school that has been collaboratively designed, built and operated.

For a modest capital investment PassivHaus generates very low:•Power consumption kW•Utility bills (revenue costs) £•Carbon emissions CO2

The tools required include:•Collaboration •Benchmarking•Life cycle cost •Building Information Modelling•Facilities management


Collaboration

Collaboration

QS

Main contractor

Client

Subcontractor

FM

ArchitectStructural MEP

PM


Design, Build, Operate


BIM Collaboration

Information is added to the same model as the design progresses.

The coordinator can merge the separate files by converting to IFC “common” file format

The Design & Build contractor can add supply chain information

The client owns the completed BIM and amends with refurbishment and adaption

Data enrichment

Main contractor

Client

Specialist sub

contractor

FM

ArchiCadArchitecture

TEKLAStructural

Bentley SystemsMEP

Quantity extraction


Benchmarking

Benchmarking


Benchmark: Capital

The Cabinet Office has published benchmarksSecondary school of 8-10,000 m² is average £ 2,158/m²This school (Primary) 2,400m² £ 2,077/m²

“More for less”“Good is good enough”20% savings in capital cost


Benchmark: power, revenue and carbon

CIBSE has produced benchmarks for power consumption and carbon emissions.

Schools and seasonal public buildings

Previous school F 260 kW/m²Average D 190 kW/m²

Target B 120 kW/m² (less than half)

Utility cost per annum £11,000 (previous £27,000)Carbon emissions 73 tCO2 (previous 190)


Life cycle cost

Life cycle cost

Capital

MaintenanceReplacement

Operation


Framework “J” curve

With a framework the supply chain can afford to invest, gain experience and improve.

20

15

10

0

-5

5

-10

-15


Cost benefit analysis

Capital cost Project 1 2% (+) £108,000Project 2 1% (+) £54,000Project 3 0% (+) £0

Revenue savings•power consumption (-) 120 kW/m²pa 70-190•Utility bills (-) £16,000 11-27k•Carbon emissions (-) 105 tCO2 75-180t

Payback 8,4,0 years


Building Information Model


Building Information Models

What is a Building Information Model?

A 3D drawing plus information

All the data for a project is stored in one fileThe data is dynamically inter related

The information we need to add includes:

Capital cost, time programmes, life cycle costs, capital allowances, embodied carbon, carbon in use and Facilities Management

3D + i


3D, 4D and 5D

3D

A Architecture

S Structural

ME Mechanical Electrical and Plumbing

4D W +TIME planning and construction simulation

5D Q +COST (Capital, life cycle & FM)


Benefits

All information in one file Co-ordinated collaboration

Visualisation High level reporting to managementClash detection Solving problems before siteBuilding performance Daylight, heat loss, reverberation

Standard component library Create a standard specificationLean constructioneconomies of scale

Standard format for data Reuse and transfer of information

Client operational data Refurbishment / adaption / space planning


Click on “Family” for Information including length, area and volume.

“Family” information


“Family” additional parameters

+QS, PM, BS and FM dataCapital ratesLife cycle cost (anticipated life expectancy)Carbon reductionCapital allowancesProgramming and phasingBuilding reinstatement costHealth & safetyClient accountancy codingAsset registersTrade package codingRisk managementFacility management planningMaterial scheduling


“Family” design options and level of detail

“Level of detail”

1 Concept

2 Schematic

3 Technical

Alternative>Doors: Timber, metal, glass etc. Boiler: Biomass, Gas, CHP.


Revit plus

Designers Cost, time and carbon

Revit file (*.rvt)

Object Position Floor X(m)

Y(m)

Z(m)

Truss A:A +2 10.3 5.60 0.003

AHU A:A +1 1.00 1.00 1.00

Door B:B 1:2 0.30 0.30 4.00

Object Rate£

LifeYears

Material

Truss 500 70 Steel

AHU 1000 15 Copper

Door 300 45 Hardwood

Supply chainFamily files (*.RFA)

Architect

Structure

M&

E

QS

& P

M

Application Programming

Interface(API)

Revit Program

SQ

L Database


RLBIM API “add in”

x


RLBIM: import RLB database

RLBIM External database(NRM description library).OUTSIDE of Revit but accessible from within Revit.

The “primary key” is the same assembly code as used within Revit


Capital cost plan in Revit

And Elemental Breakdown


RIBA plan of works: COBie drops

ArchitectureStructural MEP

1 2

Appraisal

Design brief

Preparation

Concept

Design development

Technical design

Design

Production information

Tender documentation

Tender action

Pre-construction

Mobilisation

Construction

Construction

Post completion

Operation

RIBA Plan of Works A B C D E F G H J K L

Cobie drop 1 2 3 4 5Contractor Owner

43 5

QS

COBie

3D Design

Construction Operations Building Information Exchange


Conclusion

Conclusion


Summary

Delivering sustainability from start to finish in a cost-effective way

A holistic approach to capital and revenue

•Collaboration•Building Information Modelling•Life cycle cost planning

Benefits:

•Economies of scale and standardisation -£•Lower power consumption -kW•Lower utility bills (revenue costs) -£pa•Lower Carbon emissions -CO2

“More for less”“Good is good enough”20% savings in capital cost


Delivering sustainability

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RLB.com

mailto:[email protected]

http://www.rlb.com/

BIM And the cost of sustainability

Documents

utility cost

cost of sustainability3d

cost of sustainabilitydesign

completed bim

supply chain information

capital allowances

life cycle costs

life cycle fmjanuary