CPCCBC4001A Apply building codes and standards to the construction process for low rise building projects

CPCCBC4001A Apply building codes and standards to the construction process for low rise building projects

Lesson Two Classification of Buildings and Acceptable ConstructionMichael Martin - Cert IV - Codes and Standards 2012

NoteThe following slides make use of the ABCB National Construction Code Awareness Resource KitAnd have been condensed or modified to suit this context.Michael Martin - Cert IV - Codes and Standards 2012Todays LessonHandout (next section P 21 to 36)Classification of BuildingsPerformance and Acceptable ConstructionCompliance with the BCAWhat the BCA applies to

Michael Martin - Cert IV - Codes and Standards 2012National Construction Code SeriesNational Construction Code Series

Building CodeVolume ThreeGuide toVolume OneVolume OneAppendicesVolume TwoVolume OnePlumbingCodeMichael Martin - Cert IV - Codes and Standards 20124The NCC Series comprises the Building Code of Australia (BCA), Volume One and Volume Two; and the Plumbing Code of Australia (PCA), as Volume Three.

The State and Territory Appendices which contain their variations and additions, form part of Volume One but are published as a separate document.

To support Volume One of the BCA, the Guide to Volume One is also produced.

Todays presentation will focus on the operation and the application of the Building Code of Australia (or Volume One and Two of the NCC Series), which we will now refer to as the BCA.

Proceed to the next slideUsing the BCA from P21Classifications in whole are in Volume 1, Section A, General ProvisionsPart A3.2 (BCA 2012 from page 39) Its important to read the rest of the general provisions to see what's applicable to the classificationsBCA Volume 2, section 1.3 (BCA 2012 from page 35) Michael Martin - Cert IV - Codes and Standards 2012Using the BCA from P21Once the classification has been established the volume applicable to the proposed building work can be identifiedIn most cases for us, it will be Volume Two, for we are working within the residential building sector.The next step is to work progressively through Section 3 and compare the proposed building work against the Deemed-to-Satisfy Provisions

Michael Martin - Cert IV - Codes and Standards 2012Classification - from P22 The Classification of a building or part of a building is determined by the purpose for which it is designed, constructed or adapted to be used (BCA, 2012 A3.1). This helps not only in classifying construction requirements, but also governs various other requirements such as: those for waterproofing, sanitary facilities, room sizes, light, ventilation and noise controlMichael Martin - Cert IV - Codes and Standards 2012What is a Class of Building?Not in your text specificallyThe Class or Classification of a building/structure is determined by the purpose for which it is designed, constructed or adapted to be used. As the purpose of buildings vary the BCA has different requirements for different classes of buildingsOperation of the BCAMichael Martin - Cert IV - Codes and Standards 20128Read the slide

Lets consider a simple example - if you think of the goals of the BCA, one of which is to provide a safe environment during the evacuation of occupants in a building, then therell obviously need to be different requirements for different uses of buildings.

Take a hospital as an example - it would be reasonable to expect that it will be much more difficult to evacuate 50 patients from an Intensive Care facility in a hospital than to evacuate 50 military cadets from a school hall.

Therefore - we need to have special safety requirements in a hospital to allow for the fact that it will take more time to evacuate occupants.

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Classes of BuildingsPart A3 of the BCA provides detailed descriptions of various classes of buildings.The classifications and typical examples include:Class 1a single dwellings / housesClass 1b small guest / boarding housesClass 2 dwellings / apartments (above others)Class 3 hotels / motels (unrelated persons)Class 4 a single dwelling in a Class 5 to 9Michael Martin - Cert IV - Codes and Standards 20129Read the first dot point

For the purposes of this presentation an abbreviated version of the descriptions is provided

Read the remainder of the slide

As you can see - Class 1 to 4 buildings are types of residential buildings

A simple way of remembering the main difference between a Class 1 and a Class 2 building is that Class 1 buildings are not located above or below dwellings or another class of building (except a private garage). Class 1 dwellings need to be freestanding, or located side by side.

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Classes of BuildingsClass 5 offices not Class 6 to 9Class 6 retail shopsClass 7a carparks Class 7b storage / display warehousesClass 8 a laboratory or factoryClass 9a health-care buildingClass 9b assembly buildingOperation of the BCAMichael Martin - Cert IV - Codes and Standards 201210Read the slide

Notice that some of the descriptions are written in italics and the reason for this is that these terms are defined in the BCA. We'll talk about definitions in detail later in the presentation; however for the purposes of this slide its enough to say that use of italics in the descriptions of some classes helps users identify the appropriate classification

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Classes of BuildingsClass 9c aged care buildingClass 10a non-habitable building (e.g. a carport/ garage)Class 10b structure swimming pool fenceClass 10ca private bushfire shelterBuildings can have multiple classifications Each part of a building must be classified separately, except that if not more than 10% of floor area of the part in which it is located, the major classification may apply (exclusions apply See A3.3).Look in your text notes to further explain & view example P24 to 25Michael Martin - Cert IV - Codes and Standards 201211Read the four dash points

The BCA allows a single building to have multiple classifications provided it is designed to comply with the BCA for the various classifications. As an example, a Class 7 warehouse could be used as a dance party venue one night a week; i.e. as a Class 9b building - provided it was designed to comply with both Class 7 and Class 9b Performance Requirements

Additionally the BCA requires each part of a building that has a different use to be classified in accordance with the use of that part. This rule generally applies unless the area of the part is not more than 10% of the floor area of the storey in which the part is located and is an ancillary use to the dominant classification; although there are some nominated exclusions.Therefore, if an ancillary area is less than 10% of the floor area of that storey, it may be classified the same as the remainder of the storey instead of needing to comply as a separate classification.

Lets have a look at an example on the next slide

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Exercise - from P24 BuildingClassification ?

1. abattoirs 82. hospital 9a

3. government offices 5

4. football ground stadium9b5. two storey house 1a6. block of flats 2

7. hotel 3

8. butter factory.8

Michael Martin - Cert IV - Codes and Standards 2012Performance & Acceptable Construction - from P27 Performance based regulations differ in that they set levels of performance that must be achieved.also referred to as objective based set mandatory levels of performance required do not dictate how to achieve required resultsmust ultimately be accepted by a Certifying Authority Michael Martin - Cert IV - Codes and Standards 2012Volume TwoMichael Martin - Cert IV - Codes and Standards 2012Section 1Section 2Section 3Contains information on the operation and application of the BCAContains all Performance Requirements for volume TwoContains Acceptable Construction or the Deemed-to-Satisfy ProvisionsAcceptable ConstructionAcceptable Construction Manuals can include Australian Standards Acceptable Construction Practice will generally reflect traditional construction techniques

Michael Martin - Cert IV - Codes and Standards 2012ACCEPTABLECONSTRUCTIONACCEPTABLECONSTRUCTIONMANUALSACCEPTABLECONSTRUCTIONPRACTICEORBCA Structure & Example - from P28 Performance Requirements state mandatory levels of performance for Building SolutionsBuilding Solutions are solutions that comply with Performance Requirements and may be: a Deemed-to-Satisfy solution or an Alternative Solution or a combination of both

Michael Martin - Cert IV - Codes and Standards 2012BCA Structure & Example - BCA, Part 3, section 3 Parts 3.1 to 3.12 (BCA 2012 from page 101)These are deemed-to-satisfy provisions that are considered to be acceptable forms of construction that meet the legislative requirements for complying with the housing provisions (BCA, 2012 p. 101)Michael Martin - Cert IV - Codes and Standards 2012Scenario OneMichael Martin - Cert IV - Codes and Standards 2012

Scenario OneWhat's the problem ?Site drainage problemCausing water ponding in sub floorDecay of stumpsDecay of timber joists and bearersWhat class of building ?Class 1a, residential house

Michael Martin - Cert IV - Codes and Standards 2012BCA SpecificBCA 3.1.2.3 Surface water must be diverted away from class 1 buildings as follows:(c) The ground beneath suspended floors must be graded so that the area beneath the building is above the adjacent external finished ground level and surface water is prevented from ponding under the building (see figure 3.1.2.3)Continues next slideMichael Martin - Cert IV - Codes and Standards 2012BCA Specific (2012 page 118)Michael Martin - Cert IV - Codes and Standards 2012

BCA Specific (BCA 2012, page 118)Also consider3.1.2.4 Subsoil drainageWhere a subsoil drainage system is installed to divert subsurface water away from the area beneath a building, the subsoil drain must

Anything else ??Michael Martin - Cert IV - Codes and Standards 2012