BCA Section J Report Sydney, NSW | Part J Report Sydney, NSW

Section J Report

The Building Code of Australia (Volume One) contains energy efficiency provisions that apply to Class 3, 5, 6, 7, 8 and 9 (commercial) buildings. A compliance report (commonly called a Section J or a Part J Report) is required before construction commences for new buildings and for alterations and additions.

Gradwell Consulting has extensive experience in preparing comprehensive, cost effective and easy to understand reports. Contact us now for a fee proposal.

We also offer obligation free review if you have a problem with an existing Section J Report.

The most common methodology used for evaluating compliance is called Deemed-to-Satisfy (DtS). A DtS based Section J (or Part  J) report ensures that the design meets the exact DtS Provisions in the BCA.

Most designs are successfully assessed using DtS, however Verification Method JV3 is an important alternative solution when increased flexibility is required.

Gradwell Consulting has completed many DtS and JV3 based reports and can provide advice on the best approach.

Useful Link: Australian Building Codes Board  www.abcb.gov.au

DtS is the simplest approach to preparing a Section J report. A DtS-based report examines the building fabric (floors, roof and walls), glazing, sealing, air-conditioning and ventilation, artificial lighting and power, hot water supply and access for maintenance.

Each aspect must meet or exceed the requirements in Section J of the building code. There is no prescribed format for the compliance report, however Gradwell Consulting has developed easy to follow templates.

Although DtS is fairly straightforward and works well for simple structures, it can struggle to address more complex situations.

Some important limitations include:
•    each element of the building must pass the minimum standard prescribed.
•    walls, floors, roof/ceiling are assessed independently.
•    glazing calculations are somewhat simplistic and each facade must pass on its own.
•    only certain types of shading can be included in the assessment.
•    no credit is given for superior performance.
•    on-site generation of energy is not acknowledged.

This is a long list and it is increasingly common for JV3 computer simulation to be selected as the best approach.

Although more work, the JV3 approach offers much greater flexibility. The ability to “trade-off” aspects of the design is a huge plus. This avoids the prescriptive nature of DtS that often results in a solution that is impractical for construction, cost or aesthetic reasons.

The basic steps for Verification Method JV3 are:

•    build a 3D model of the building (usually imported from CAD information).
•    set up the model to represent the DtS (reference) model.
•    set up a new model to represent the proposed design.
•    ensure that the proposed building does not exceed the annual energy used by the reference building.

These comparisons are undertaken with DtS services and defined specifications for occupancy and operation. It is also possible to use the computer simulation to then improve the services (e.g. HVAC).

Gradwell Consulting uses leading software packages DesignBuilder and EnergyPlus for building simulation.
There are many factors that will determine whether Deemed-to-Satisfy (DtS) or Computer Simulation (JV3) should be used. Because it is less time consuming, DtS is usually the default choice. But it is often not the best choice.

JV3 can result in a design that costs less to build so the money invested in computer simulation is well spent. And DtS will sometimes result in a design that is impractical or not in tune with the original design concept.

For these reasons, Gradwell Consulting recommends that designers seek advice early in the design process.

Gradwell Consulting uses DesignBuilder for all advanced simulation work.

Developed in the UK, this leading software provides powerful 3D modelling tools and has a sophisticated database for managing construction materials, openings, activity, HVAC, lighting, heat loads etc.

DesignBuilder also includes powerful 3D visualisation tools that allow shadow assessment, building walk throughs and daylighting analysis to name a few.

Thermal simulation is performed by EnergyPlus – the US Department of Energy developed modeller.

These tools have allowed Gradwell Consulting to provide solutions for projects ranging from small warehouses to large residential aged care facilities.

Useful Link: www.designbuilder.com.au

+ Descriptions

The Building Code of Australia (Volume One) contains energy efficiency provisions that apply to Class 3, 5, 6, 7, 8 and 9 (commercial) buildings. A compliance report (commonly called a Section J or a Part J Report) is required before construction commences for new buildings and for alterations and additions.

Gradwell Consulting has extensive experience in preparing comprehensive, cost effective and easy to understand reports. Contact us now for a fee proposal.

We also offer obligation free review if you have a problem with an existing Section J Report.

The most common methodology used for evaluating compliance is called Deemed-to-Satisfy (DtS). A DtS based Section J (or Part  J) report ensures that the design meets the exact DtS Provisions in the BCA.

Most designs are successfully assessed using DtS, however Verification Method JV3 is an important alternative solution when increased flexibility is required.

Gradwell Consulting has completed many DtS and JV3 based reports and can provide advice on the best approach.

Useful Link: Australian Building Codes Board  www.abcb.gov.au

+ DtS

DtS is the simplest approach to preparing a Section J report. A DtS-based report examines the building fabric (floors, roof and walls), glazing, sealing, air-conditioning and ventilation, artificial lighting and power, hot water supply and access for maintenance.

Each aspect must meet or exceed the requirements in Section J of the building code. There is no prescribed format for the compliance report, however Gradwell Consulting has developed easy to follow templates.

Although DtS is fairly straightforward and works well for simple structures, it can struggle to address more complex situations.

Some important limitations include:
•    each element of the building must pass the minimum standard prescribed.
•    walls, floors, roof/ceiling are assessed independently.
•    glazing calculations are somewhat simplistic and each facade must pass on its own.
•    only certain types of shading can be included in the assessment.
•    no credit is given for superior performance.
•    on-site generation of energy is not acknowledged.

This is a long list and it is increasingly common for JV3 computer simulation to be selected as the best approach.

+ JV3

Although more work, the JV3 approach offers much greater flexibility. The ability to “trade-off” aspects of the design is a huge plus. This avoids the prescriptive nature of DtS that often results in a solution that is impractical for construction, cost or aesthetic reasons.

The basic steps for Verification Method JV3 are:

•    build a 3D model of the building (usually imported from CAD information).
•    set up the model to represent the DtS (reference) model.
•    set up a new model to represent the proposed design.
•    ensure that the proposed building does not exceed the annual energy used by the reference building.

These comparisons are undertaken with DtS services and defined specifications for occupancy and operation. It is also possible to use the computer simulation to then improve the services (e.g. HVAC).

Gradwell Consulting uses leading software packages DesignBuilder and EnergyPlus for building simulation.
There are many factors that will determine whether Deemed-to-Satisfy (DtS) or Computer Simulation (JV3) should be used. Because it is less time consuming, DtS is usually the default choice. But it is often not the best choice.

JV3 can result in a design that costs less to build so the money invested in computer simulation is well spent. And DtS will sometimes result in a design that is impractical or not in tune with the original design concept.

For these reasons, Gradwell Consulting recommends that designers seek advice early in the design process.

+ DesignBuilder

Gradwell Consulting uses DesignBuilder for all advanced simulation work.

Developed in the UK, this leading software provides powerful 3D modelling tools and has a sophisticated database for managing construction materials, openings, activity, HVAC, lighting, heat loads etc.

DesignBuilder also includes powerful 3D visualisation tools that allow shadow assessment, building walk throughs and daylighting analysis to name a few.

Thermal simulation is performed by EnergyPlus – the US Department of Energy developed modeller.

These tools have allowed Gradwell Consulting to provide solutions for projects ranging from small warehouses to large residential aged care facilities.

Useful Link: www.designbuilder.com.au

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