BC - BCA 2011 Seminars

Legislative and Building Code of Australia 2011 Changes

Information Seminars – April 2011

WELCOME

Program

9.00 am – 10.30 am - Session one

� The National Construction Code Series

� Proposed Building Act and Regulations update and Premises

Standards

� Main BCA 2011 Changes inc. Access

Morning Tea – 30 mins

11.00 am – 12.30 pm - Session two

� Main BCA 2011 Changes continued

� BCA Energy Efficiency / 6 Star

Lunch – 1hr

The National Construction Code Series

NATIONAL CONSTRUCTION CODE SERIES

Volume 1 BCA 2011 – Class 2-9 buildings – Blue

Volume 1 BCA Appendices - White

Volume 1 BCA Guide – Yellow

Volume 2 BCA 2011 – Class 1 & 10 buildings – Red

Volume 3 PCA - Green

Building Act Update

Building Act Amendments

� To recognise the National Construction Code

Series

� To align with and complement the Premises

Standards

Section 3 New Definitions

"National Construction Code Series means the National Construction Code Series published by the Australian Building Codes Board as amended or remade from time to time;".

"Building Code of Australia means the Building Code of Australia comprising—

(a) Volume One of the National Construction Code Series including any variations or additions in the Appendix Victoria set out in the Appendices to that Volume; and

(b) Volume Two of the National Construction Code Series including any Victoria additions set out in Appendix A of that Volume;".

Section 221B(1) has been amended to include Volume 3 of the

NCC Series

"Plumbing Code of Australia means the Plumbing Code of

Australia set out in Volume Three of the National Construction

Code Series including any variations or additions in the Appendix

Victoria set out in Appendix A of that Volume;".

PREMISES STANDARD HISTORY

� History of the Access Provisions

� Development of the Disability (Access to Premises – Buildings)

Standards 2010

� Alignment of the BCA with the Access Code


New Section 160(4)

(4) ‘An application must not be made under this section in relation to

an access provision of the building regulations within the

meaning of section 160B.’

All applications to the BAB relating to an ‘access provision’ will

now be made under Section 160B


� Premises standards administrative requirements (unjustifiable

hardship)

� New Section 160B – application to the Building Appeals Board

– Determination on modifications and or exceptions to BCA

requirements

– Based on unjustifiable hardship

Building Regulation Update

BUILDING REGULATIONS AMENDMENTS

� Building Amendment Regulations 2011

� Building Amendment (Private Bushfire Shelter Construction)

Regulations 2011

� Both come into effect on 1 May 2011

� Generally to reference BCA Volume One and BCA Volume Two

of the NCC

� Sets the Fee for a S160B application as $516.30

� Amends form 1 (application for building permit) to include details

of lessee


� New Regulation 116

� Consistency with the concessions under sections 4.3, 4.4 and 4.5

of the Disability (Access to Premises - Buildings) Standards 2010

Applies to

� lessees who submit an application for approval for the building

work

� existing passenger lifts

� existing accessible toilets and

� 'affected parts' of an existing building not subject of a building

permit application to comply with the BCA.


� New definitions

‘access provision'

'affected part'

in relation to a building that is to contain new parts, means-

(a) the principal pedestrian entrance of the building; and

(b) any part of the building that is necessary to provide a continuous

accessible path of travel from the entrance to the proposed new part;

'new part’

in relation to an existing building, means a part of that building that is to

be altered, including an extension to the building, in respect of which an

application for a building permit is made after 1 May 2011.

National Construction Code Series 2011 BCA Volume One and Volume Two

Overview - Main Changes

� Private Bushfire Shelters

� Fire Hazard Properties

� Definitions

� Access

� Referenced Documents

� 6 Star Energy Efficiency

� Other Amendments

Private Bushfire Shelters


� Class 10c – a private bushfire shelter

� Private bushfire shelter means a structure

associated with a Class 1a dwelling that may, as a

last resort, provide shelter for occupants from

immediate life threatening effects of a bushfire.

� In Victoria substitute Class 1 building


New Performance Requirement P2.3.5 BCA Volume Two

- Location relative to fire hazard

- Occupancy of shelter

- Bushfire intensity

- Ready access to and egress from

- Tenability within the bushfire shelter


� No Deemed-to-Satisfy solutions

� Guidance document – ABCB Private

Bushfire Shelters Performance Standard

� Professional judgement required

to develop designs

Fire Hazard Properties C1.10

� Spec C1.10 and Spec C1.10a consolidated

� Defined term – ‘Fire hazard properties’ amended to include Group

Number

� Performance Requirement CP4 application provision included –

applies to linings, materials and assemblies

� C1.10(c) Exemption attached non-building fixture or fitting (e.g.

curtain, blind, whiteboard or the like)

ACCESS

ACCESS – PARTS D3, E3.6, F2.2 AND F2.4

Summary of changes:

� New access requirements additional to those currently in the BCA

� Improvements to access provisions already in the BCA

� Improvements to Australian Standards referenced in the BCA

� Inclusion of a new Part H2 to the BCA – Public Transport Building

Definitions

� Premises standards to apply to new Class 1b

� Class 1b classification now includes:

– 4 or more single dwellings on one allotment and used for short term

holiday accommodation

� Class 1b does not apply to dwellings located above or below

another dwelling

Classification

Class 1 — one or more buildings, which in association constitute —

(b) Class 1b —

(i) a boarding house, guest house, hostel or the like—

(A) with a total area of all floors not exceeding 300 m2 measured over the enclosing walls of the Class 1b building; and

(B) in which not more than 12 persons would ordinarily be resident; or

(ii) 4 or more single dwellings located on one allotment and used for short-term holiday accommodation,

which are not located above or below another dwelling or another Class of building other than a private garage.

Explanatory information:

Class 1b buildings used for short-term holiday accommodation include cabins in caravan parks, tourist parks, farm stay, holiday resorts and similar tourist accommodation. This accommodation itself is typically rented out on a commercial basis for short periods and generally does not require the signing of a lease agreement. Short-term accommodation can also be provided in a boarding house, guest house, hostel, bed and breakfast accommodation or the like.

Table D3.1

New areas of access

Class 2 buildings (flats, apartments, units)

� Required to front door of SOUs on one level

� To and within one of each type of common area (e.g. gym,

swimming pool, lounge area)

� To each level (SOU door and common areas) if served by an AS

1428.1 ramp or a lift

� Note BCA covers all new Class 2 buildings

� Accessible carparking not required for Class 2

New areas of access

Class 10b swimming pools

� To and into a pool with a total perimeter greater than 40 m, associated

with a Class 1b, and Class 2,3 and 5 - 9 buildings required to be

accessible

� Does not apply to a swimming pool for the exclusive use of occupants of

a Class 1b or an SOU in a Class 2 or 3 building

� Access can be provided by-

– Ramp

– Zero depth entry

– Platform swimming pool lift

– Sling lift

Improved access provisions

Building entrances

� Through the principal pedestrian entrance and not less than 50%

of all entrances (including principal entrance)

� If a building has a total floor area of more than 500 square metres

an accessible entrance must be no more than 50 metres from one

that is not accessible.


Dimensions and circulation spaces

� Generally a move to larger dimensions to accommodate a larger

percentage of mobility aids

� Doorway widths increased – Required clear width

– BCA 2010 – 800mm

– BCA 2011 – 850mm

� dimensions of lift cars travelling more than 12 m has increased

from 1100 x 1400 mm to 1400 x 1600 mm.

Required clear width

BCA 2010 – 800 mm

BCA 2011 – 850 mm


� Unisex accessible sanitary compartment increased 300mm in

both directions

� Backrests required


Passing and turning spaces

� Passing spaces every 20 m where direct line of sight not possible

� Turning spaces 2 m before end of an accessway and every 20 m

on an accessway

Lift types

� Introduces a wider range of lift options, with limitations on use

� Specifies features that each type of lift must have


Extent of access in buildings

� Class 3 – accessible rooms and one of each common area

� Class 5, 6, 7b, 8, 9a, 9b schools - to and within all areas normally

used by the occupants

� Class 7a carparks – to and within any level containing accessible

carparking spaces

� Class 9b assembly buildings – to wheelchair seating spaces and

other areas normally used by the occupants (but not all seating

levels)


Carparking

� Numbers of accessible spaces generally unchanged

– Increase for clinics and day surgery

� The layout of accessible spaces has changed – AS/NZS 2890.6

5400

240024002400

Shared areas

Accessible space

Accessible space

Bollard

Parking aisle or roadway

2400


Extent of access in buildings - exemptions

� D3.3 - Small building concession

- Class 5, 6, 7b or 8 buildings

- No more than 3 storeys and upper floors not more than 200 m²

� D3.4 - Access not required where:

- Access is inappropriate because of use of area; or

- Area would pose a health or safety risk


Accessible features on stairs

� Every ramp and stairway (other than fire isolated) must comply

with clause 10 and 11 of AS 1428.1

� Fire isolated stairways must have luminance contrast nosing

strips


Sanitary facilities

� Generally a unisex accessible toilet must be provided on every

storey where there are toilets

� If more than one bank of toilets on any floor then unisex

accessible toilets at 50% of banks

� Ambulant accessible toilet in addition to unisex accessible toilet

� Left and right handed facilities where more than one provided


Signage

� Improved signage about type of hearing augmentation system

used and where receivers can be obtained (if used)

� Signage indicating right or left hand transfer in unisex accessible

sanitary facilities

� Signage indicating ambulant accessible toilets

LH RH


Hearing augmentation

� Requirements for specific types of systems included

– Increased area coverage for induction loop system from 15% to

80% of area

– System using receivers must cover 95% of the area and

receivers must be provided as a ratio of the number of occupants

on a sliding scale

� Removal of the 100 m2 room size concession


Wheelchair spaces in assembly buildings

� Increased number of wheelchair seating spaces

� Location and grouping specified to provide seating options

including restrictions on how many wheelchair seating spaces can

be located in front rows of cinemas


Connection of ramps

� Restriction on vertical rise of connected ramps –not more

than 3.6 m

� Separate landings for step ramps

12

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12

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Access - Improved Australian Standards

� AS 1428.1 2009 General requirements for access – New building

work

� AS/NZS 1428.4.1 2009 Means to assist the orientation of people

with vision impairment - Tactile ground surface indicators

� AS/NZS 2890.6 2009 Off-street parking for people with disabilities

Access – Public transport buildings

� New Part H2

� Part H2 provisions transferred from Disability Standards for

Accessible Public Transport

� Part H2 takes precedence over other provisions of the BCA

where there is a difference

BCA REFERENCED DOCUMENTS

BCA referenced documents

Substantial Changes & Edition Updates

� AS 1680 Interior lighting

� AS 1684 Residential timber-framed construction

� AS 1720 Timber structures

� AS 1926 Swimming pool safety – Part 3

� AS 2159 Piling Design and installation

� AS 3600 Concrete structures

� AS 3959 Construction in bushfire-prone areas

� AS 4773 Masonry in small buildings


AS 1680 Interior Lighting

� 2009 edition of Part 0 – Safe movement referenced

AS 1720 Timber structures

� 2010 edition of Part 1 – Design methods referenced


AS 1684 Timber-framed construction

� 2010 editions of Parts 2, 3 & 4 referenced

AS 1926 Swimming pool safety

� 2010 edition of Part 3 - Water recirculation systems referenced


AS 2159 Piling – Design and installation

� 2009 edition referenced in BCA 2010

� 1995 edition removed in BCA 2011

� 12 month transition period now over

AS 3600 Concrete Structures

� 2009 edition referenced

� 2001 edition retained for 12 month transition


AS 3959 Construction of buildings in bushfire-prone area

Amendment 2 to 2009 edition

– Grassland vegetation type

– Sarking

– Log wall construction


AS 4773 Masonry for small buildings

New standards specifically for small buildings

Class 1 and 10a Only

– Part 1 – Design

– Part 2 – Construction

� 12 month transition period


� AS 3500 - Plumbing and drainage Part 3 – Stormwater drainage,

Amendment 2

� AHRI 460 - Remote mechanical-draft air-cooled refrigerant

condensers, 2005 edition

� AHRI 550/590 - Water chilling packages using vapour

compression cycle, 2003 edition

Other Amendments to Volume One & Volume Two

Structural Provisions

� Performance Requirements amended to align with accepted

structural engineering terms:

– “appropriate degrees of reliability”

– “expected design actions”

– “designed to sustain local damage”

Structural ProvisionsB1.4 Glazing - Nickel sulphide inclusions

� 12 month transition period ended

� Spontaneous fracture caused by

nickel sulphide

� Ongoing problem, particularly in

high rise buildings

� Provisions apply to:

- Class 2 – 9 buildings

- Sloped overhead glass higher than 3 m

- Vertical glass higher than 5 m

- Windows and Glass balustrades

Structural ProvisionsB1.4 Glazing - Nickel sulphide inclusions

� Annealed glass; or

� Heat strengthened glass – surface compression of 24 – 45 MPa;

or

� Laminated safety glass – AS/NZS 2208; or

� Toughened glass and heat strengthened glass – surface

compression of >45 MPa

– EN 14179.1; or

– Protective balcony or awning

Measurement of stairway and ramp widths

� Method of measuring a stairway or ramp width relocated from

D2.9 to D1.6

� D2.9 heading amended to include ramps

� 2 m division of handrails amended

Operation of a latch

D2.21

� Concession for operation of latch removed for entry doors to

SOUs in certain Class 3 buildings

� Affects a boarding house, guest house, hostel,

lodging house or backpacker accommodation

Concrete aggregate and curing

3.2.3.1

� Aggregate in concrete to be maximum nominal size of 20 mm

� Concrete must be cured in accordance with good building

practice

Ceiling Heights

� Figure 3.8.2.1 – New diagram to clarify requirements for sloping

ceiling heights

Room Heights Part F3

� Corridor ceiling heights for Class 9b buildings-

– Serving up to 100 people - 2.4 m

– Serving more than 100 people - 2.7 m

Figure 3.8.2.1

Clarify requirements for

sloping ceiling heights

ENERGY EFFICIENCY

Victorian Specific Exclusions Removed

Residential Energy Efficiency Volume One Victorian Appendix

� The limitations and applications in Section J BCA 2010 that

referenced BCA 2009 have been removed

– Class 2 and Class 4 part of a building now referenced

Residential Energy Efficiency Volume Two

� State Variation that referenced BCA 2009 5 star rating has been

removed

– Class 1 and 10a buildings now required to meet 6 star Energy Efficiency

Energy Efficiency

� No major changes to Section J and Part 3.12 in 2011 from BCA

2010

� Two new standards referenced

� Changes to improve consistency between Volume One and

Volume Two

� Clarification of intent

Renewable Energy

� Renewable energy means energy that is derived from sources

that are regenerated, replenished, or for all practical purposes

cannot be depleted and the energy sources include, but are not

limited to, solar, wind, hydroelectric, wave action and

geothermal.

� Clarified Performance Requirements for services

ENERGY EFFICIENCY Volume One

VERIFICATION METHOD JV1

Moved to new Deemed-to-Satisfy Part J0

Performance requirement

Deemed-To-Satisfy Provisions

Stringency:

• Minimum R-

Values

• Glazing

allowance

• etc

• AS/NZS

4859.1

• Installation

• Thermal

breaks

• etc

Alternative solution

Class 2 & 4

• Star

rating

Objective

Functional statement

DTS COMPLIANCE PATHWAY

Sole-occupancy units of a Class 2

building or a Class 4 part

� Star rating approach:

– Average 6 stars

– Minimum 5 stars

� Ceiling fan details

� Specific J1 clauses

� Parts J3 & J5 to J8

Other Classes & Class 2

common areas

� Elemental approach:

– Parts J1 to J8

New Deemed-to-Satisfy Part J0

SO MUST USE STARRATING PLUS ELEMENTAL

APPROACH FOR CLASS 2 SOUs ORCLASS 4 PARTS

BCA 2011 – Volume 1 Part J0.3

� Ceiling fans required as part of J0.2(a) must

- Be permanently installed

- Have a speed controller

� Single fan serving a whole room

- 900 mm for rooms not exceeding 15m²

- 1200 mm for rooms not exceeding 25m²

Solar Absorptance

� Table J1.3a

� Solar absorptance value

– Changed from 0.5 to 0.4

Table J1.3a ROOFS AND CEILINGS – MINIMUM TOTAL R-VALUE FOR EACH CLIMATE ZONE

4.83.73.24.2Minimum Total R-Value for a roof or ceiling with a roof upper surface solar

absorptance value of more than 0.6


absorptance value of more than 0.4 but not more than 0.6


absorptance value of not more than 0.4

UpwardsDownwardsDirection of heat flow

874, 5 & 61, 2 & 3Climate zone

Section J – Part J3 Building Sealing

� Climate zone 5 added to the locations in which habitable room

must have:

– Windows and door seals (J3.4)

– Self closing dampers on exhaust fans (J3.6)

– Self closing dampers on evaporative coolers (J3.7)

� External swing doors:

– Must have a draft protection device on the bottom edge (J3.4)

– Other edges may have compression type seals

ROOF LIGHTS

� Climate Zone 5 added to J3.3 and J3.6(a)

– Roof lights and Construction of roof, wall and floors

� A roof light required ‘to be sealed, or capable of being

sealed’

– Added to clarify intent of provision

AIR-CONDITIONING AND VENTILATION SYSTEMS

J5.2(a)

� SOU removed from J5.2(a)(v)

� Concession for process-related applications

� J5.2(a)(ix):

– Total fan power for the building, not the system

– Small un-ducted air-conditioning units exempt

– Miscellaneous exhaust systems removed

Electric Heating

– Included as an acceptable space heater

– Only limited circumstances for use

– New Table J5.4c

Section J – Part J6 Artificial Lighting and Power

� J6.2(a) for Class 2 SOU’s and Class 4 part

– Use the simple approach (lamp power density LPD); OR

– The more complex approach (illumination power density IPD) where

the allow may be increased if controls are installed

– Base allowances

- 5 W/m2 within the SOU and Class 4 part

- 4 W/m2 on a balcony or verandah

BCA 2010 – Section J – Part J6 Artificial Lighting and Power

� J6.2(a) for Class 2 SOU’s and Class 4 part

– With IPD, adjustment factors are in the existing Table J6.2

– The power of the proposed installation must be used rather

than nominal allowances for exposed batten holders

– Halogen lamps must be separately switched from fluorescent

lamps

� J6.2(b) for Classes 3 and 5 to 9

– Changes to the allowances in Table J6.2

Artificial Lighting

� J6.2(a) – Electronic type of transformer or ballast removed

� J6.3(d) – 95% of light fittings

� J6.3(e) – 250m² area

– floor area of building not storey

BCA 2011 – Section J – Part J7 Hot Water Supply and Swimming Pools and Spa Pool Plant

� Part J7.2 – Hot Water Supply

– No change in 2011

� Note the Victorian Variation

J7.2

A hot water supply system for food preparation and sanitary purposes other than

solar hot water supply system in climate zones 1.2.and 3 must be designed and

installed in accordance with Section 8 3500.4

Delete J7.2 and insert Vic J7.2 as follows:

Vic J7.2 * * * * * * * * * * * *

This clause has deliberately left blank

BCA 2011 Volume Two - Energy Efficiency

2.6 - PERFORMANCE CLAUSES

� OBJECTIVE O2.6

� FUNCTIONAL STATEMENT F2.6

� PERFORMANCE REQUIREMENT P2.6.1 - BUILDING

VICTORIA NO CHANGE

P2.6.2 Services

A building’s domestic services, including any associated distribution system and components must to the degree necessary—

(a) have features that facilitate the efficient use of energy appropriate to—

(i) the domestic service and its usage; and

(ii) the geographic location of the building; and

(iii) the location of the domestic service; and

(iv) the energy source; and

(b) obtain heating energy from—

(i) a source that has a greenhouse gas intensity that does not exceed 100 g CO2-e/MJ of thermal energy load; or

(ii) an on-site renewable energy source or

(iii) another process as reclaimed energy.

Victorian Variation P2.6.2

In Victoria, P2.6.2 does not apply to a hot water

supply system.

Note: In Victoria, the design and installation of a hot

water supply system and rain water tanks are

regulated under the Plumbing Regulations 2008.

VERIFICATION METHODS

� Verification Method V2.6.2.1

– Moved to DTS 3.12 to:

• Give it the same status as Parts 3.12.1 to 3.12.4

• Include some standard DTS clauses

� Verification Method V2.6.2.2

– Retained with minor changes

DEEMED-TO-SATISFY PROVISIONS

New Definitions

Conditioned space

4.3 MJ/hour added to current definition to clarify that heating included

gas as well as the current 1.2 kW

Illumination power density means the total power (in W/m²) that will be

consumed by the lights in a space, including any lamps, ballasts, current

regulators and control devices other than those that are plugged into

socket outlets divided by the area of the space.

Lamp power density means the total maximum power (in W/m²) rating

of the lamps in a space other than those plugged into a socket outlet

divided by the area of the space.

Renewable energy certificate (REC)

A REC is a certificate issued under the Commonwealth Government

Mandatory Renewable Energy Target Scheme

VERIFICATION METHODS

Performance requirement

Deemed-To-Satisfy Provisions

Stringency:

• Minimum R-Values

• Glazing allowance

• etc

• AS/NZS 4859.1

• Installation

• Thermal breaks

• etc

Alternative solution

V2.6.2.1

• Star rating

V2.6.2.2

• Comparative

Objective

Functional statement

DTS COMPLIANCE PATHWAYS

Star rating approach

� 6 stars [3.12.0.1(a)(i)]

� Specific 3.12.1 clauses apply

– 3.12.1.1

– 3.12.1.2(c) & 3.12.1.4(b)

– 3.12.1.2(e)

– 3.12.1.5(c) & (d)

� Part 3.12.3

� Part 3.12.5

Elemental

approach

� Part 3.12.1

� Part 3.12.2

� Part 3.12.3

� Part 3.12.4

� Part 3.12.5

New Part 3.12 with 2 optional pathways

Insulation

3.12.1.1 - New explanatory information added:

� Distance from domestic services

� When insulation acts as a vapour barrier

� Loss of R-value due to compression

BCA 2011 – 3.12.1.2 Roofs

� Increased stringency with Total R value depending on roof colour

� New (a)(ii) - Insulation in a pitch roof

– At least 50% on the ceiling

� Warning on the weight of insulation

� Compensation for loss of ceiling insulation (ie down lights, flues or

exhaust fans)

BCA 2011 – 3.12.1.2 Roofs

� Figure 3.12.1.1

– Now only inherent total R value

BCA 2011 – 3.12.1.3 Roof Lights

� More stringent

� Allowance reduced from 10% to 5%

– Unless needed to comply with Part 3.8

Table 2.12.1.2 roof lights

ROOF LIGHTS

– Explanatory Information includes worst case scenario performance

values

0.64

0.51

0.59

0.72

3.20.633.4Double layer clear

4.20.504.3Single layer translucent (“opal”)

4.20.574.3Single layer tinted

4.20.714.3Single layer clear

Total U-ValuesSHGCTotal U-ValuesSHGC

Flat, framed panelDomed panelTranslucent or transparent element description

WORST CASE WHOLE ROOF LIGHT ELEMENT PERFORMANCE VALUES WITH AN IMPERFORATED CEILING DIFFUSER

4.90.705.40.71Double layer clear

7.90.638.40.57Single layer translucent (“opal”)

7.90.638.40.66Single layer tinted

8.00.798.40.80Single layer clear

Total U-ValuesSHGCTotal U-ValuesSHGC

Flat, framed panelDomed panelTranslucent or transparent element description

WORST CASE WHOLE ROOF LIGHT ELEMENT PERFORMANCE VALUES WITHOUT A CEILING DIFFUSER OR WITH A PERFORATED

CEILING DIFFUSER

BCA 2011 – 3.12.1.4 External Walls

� More stringent

� Two Tables

– 3.12.1.3a for all external walls

– 3.12.1.3b additional for high mass walls

– High mass walls - A surface density of not less than 220 kg/m2

� Figure 3.12.1.3 now only has inherent construction values

� Explanatory information about reducing by R0.17 if air space is

filled

Figure 3.12.1.3

BCA 2011 – 3.12.1.5 Floors

� Provisions for all climate zones

� Total R-Values increased by .25

� Fine tuned approach:

– The requirement is not expressed as “enclosed” or “unenclosed”

– Enclosure details in the typical solutions

� New Sub clause (iii) – “that is enclosed beneath, must have a

barrier to convection installed below floor level between the air

space under the floor and any wall cavities”

Cavity Barrier

BCA 2011 – 3.12.1.6 Attached Class 10a Buildings

� Option (c) now only for climate zone 5 (no longer climate zone 4)

� As well as current provisions:

– Not have a garage door in the east or west orientation sector

OR

– The class 1 buildings glazing is to be reduced by 15%

� Additional Diagrams provided in BCA

BCA 2011– 3.12.2 Glazing

� Equations now include winter solar exposure (Ew) in table 3.12.2a

(Summer exposure factors remain unchanged)

� The design conductance formula changed to include the winter solar

exposure in formula

� Table 3.12.2.1 structure unchanged – only more stringent constants

� Allowances for aggregate conductance and aggregate solar heat

gain:

– Now only for climate zone 1 is the constant multiplied by the area of the

floor

– In other climate zones the constants already takes account of the area of

the floor

– Importantly revised glazing calculator

Glazing

3.12.2.2 - Shading Device

� Additional Explanatory Information provided for Winter access

– refers to the availability of winter solar gains to offset conducted

heat losses

BCA 2011– 3.12.4 Air Movement

In climate zone 4, Three options available for air movement

� Ceiling fans required by table 3.12.4.1

Now two sizes of fans

– 900mm for an area not exceeding 15m2

– 1200mm for an area not exceeding 25m2

� Evaporative cooler

� Ventilation openings 10% floor area

BCA 2011 – 3.12.5 Services

� 3.12.5.2 – Central heating piping:

– Total R value amended to material R value

– Insulation to AS/NZS 4859.1

� 3.12.5.3 – Heating and cooling ductwork

– Total R value amended to material R value

– insulation to abut adjacent insulation plus maintain

position/thickness

– Revised Table 3.12.5.2 - Heating or Cooling Ductwork and

Fittings

BCA 2011– 3.12.5 Services

� New 3.12.5.4 – Electric resistance space heating serving more

than one room to have:

– Separate on-off switches for each room

– Separate temperature control and time switches for each zone

or group of rooms

– Power loads not greater than:

• 110 W/m2 for living areas

• 150 W/m2 for bathrooms


� New 3.12.5.5 – Artificial lighting

– Lamp power density and illumination power density:

• 5 W/m2 in the Class 1 building

• 4 W/m2 for a verandah or balcony

• 3 W/m2 in a Class 10 building

– Artificial lighting around the perimeter of a building must –

• Be controlled by a daylight sensor; or

• Have an average light source efficacy or not less than 40

lumens/W


Artificial Lighting

Table 3.12.5.3

Illumination power density adjustment factor

– Manual dimming system

– Amended from 0.95 to 0.85

– Greater allowance


� New 3.12.5.7 – Pools and Spas

– Swimming pools may only be heated by solar

– Spa pools (≥ 680L) heating – Solar, Gas, Heat pump; or

A combination of the above

– A spa heated by gas or heat pump must:

• have a cover

• Have heater controlled by a push button and also a time

switch

– A swimming pool pump to have a time switch

AMENDED


� New 3.12.5.7 – Pools and Spas

– Heating for a Spa pools sharing a recirculation system with a

swimming pool must be by

• Solar, Gas, Heat pump; or

• A combination of the above

– Same change made to J7.4 of Volume One BCA 2011

ABCB - Toolkits

� Glazing and Lighting Calculators

� Handbooks

� Energy Efficiency Provisions for Electricians & Plumbers

� BCA Section J – Assessment & Verification of an Alternative

Solution

� Available to download from the ABCB website www.abcb.gov.au

Guidance Information Documentation

To be

upd

ated

To be

upd

ated

To be

upd

ated

Contact Us

Building CommissionGoods Shed North733 Bourke StDocklands VIC 3008

P.O Box 536Melbourne VIC 3001

T | 1300 815 127

E | [email protected]

ANY QUESTIONS

BC - BCA 2011 Seminars

Documents

double layer clear

principal pedestrian entrance

wheelchair seating spaces

structural provisions b1

improved access provisionsextent

private bushfire shelters

bca referenced documents

appendix victoria set