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CPCCBC4001A Apply building codes and standards to the construction process for low rise building projects Lesson Three – Scenario Exercises, and Understanding.

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Presentation on theme: "CPCCBC4001A Apply building codes and standards to the construction process for low rise building projects Lesson Three – Scenario Exercises, and Understanding."— Presentation transcript:

1 CPCCBC4001A Apply building codes and standards to the construction process for low rise building projects Lesson Three – Scenario Exercises, and Understanding Performance Requirements Michael Martin - Cert IV - Codes and Standards 2012

2 Todays Lesson Handout (next section P36 to n44 ) Review Scenario 1 Understanding Performance (begin) Scenario 2 in groups Michael Martin - Cert IV - Codes and Standards 2012

3 Scenario One Michael Martin - Cert IV - Codes and Standards 2012

4 Scenario One What's the problem ? Site drainage problem – Causing water ponding in sub floor – Decay of stumps – Decay of timber joists and bearers What class of building ? Class 1a, residential house Michael Martin - Cert IV - Codes and Standards 2012

5 BCA Specific BCA 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 ) – Continues next slide Michael Martin - Cert IV - Codes and Standards 2012

6 BCA Specific (2012 page 118) Michael Martin - Cert IV - Codes and Standards 2012

7 BCA Specific (BCA 2012, page 118) Also consider Subsoil drainage Where 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

8 Review What BCA Applies to The application of the BCA is determined by each State or Territory Generally – the BCA applies to the construction of all new buildings The BCA can also apply to additions and alterations to existing buildings The BCA, or parts of it, can also apply to proposals to change the use of a building Michael Martin - Cert IV - Codes and Standards 2012

9 Understanding Performance Requirements from P 36 text Michael Martin - Cert IV - Codes and Standards 2012

10 Understanding Performance Requirements – from P 36 text Requirements are mandatory and Deemed-to- Satisfy Provisions are optional However complying with the BCA without using Deemed-to-Satisfy Provisions – Means: developing Alternative Solutions We’ve broken this into three sections – Prescription ‘v’ performance – Developing Alternate Solutions – Assessment of Alternate Solutions Michael Martin - Cert IV - Codes and Standards 2012

11 Prescription ‘v’ Performance The old system (Prescription) – When something must be done – What must be done – How it must be done A minimum necessary standard P 37 In this system, alternative methods were sought through the courts Example of prescriptive clause on P 38 Now look at the alternate clause P 38 written as a performance requirement (the current BCA) Michael Martin - Cert IV - Codes and Standards 2012

12 Performance & Alternate Solutions No longer need to apply to Tribunals or Courts Most Certifying Authorities can now approve Alternative Solutions Performance regulations reduce the need to; – lodge objections to regulations – apply for a modification or variation of a code – appeal decisions of Certifying Authorities What do you see as the benefit of doing things the way you like ? P 39 Michael Martin - Cert IV - Codes and Standards 2012

13 BCA language & Performance we need to understand what’s actually required in order to comply P 39 must understand the wording and the language used to express Performance Requirement. There are two ways – QUALITATIVE terms or – QUANTITATIVE terms Michael Martin - Cert IV - Codes and Standards 2012

14 Qualitative This means that requirements are described using words The wording does not propose any particular means of compliance The designer has flexibility to use any acceptable means Michael Martin - Cert IV - Codes and Standards 2012

15 Quantitative This means that requirements are described using numbers That provide an absolute measure of performance This Performance Requirement specifies the intensity of rainfall that must be accommodated in the design of a surface water system Michael Martin - Cert IV - Codes and Standards 2012

16 Two key phrases To the degree necessary…… Appropriate to ……. Look over page 40 to 42 Michael Martin - Cert IV - Codes and Standards 2012

17 Developing Alternatives It’s often preferable to design something different to DTS to develop an Alternative Solution. P 42 Full compliance with the DTS is usually the simplest way to design a building following the DTS pathway may not be the most cost- efficient or practical It may also not be possible to do so if a client wants something out of the ordinary. Part A0.5 provides two pathways to demonstrate compliance of Alternative Solutions Michael Martin - Cert IV - Codes and Standards 2012

18 Part A0.5 (BCA 2012, Vol 1, P 19) 1. Developing an Alternative Solution to meet the Performance Requirements 2. Developing an Alternative Solution to at least equate to DTS Provisions We’ll carry on with this next week P 43 Michael Martin - Cert IV - Codes and Standards 2012

19 Scenario Two Michael Martin - Cert IV - Codes and Standards 2012

20 BCA Standard Specific (BCA 2012, from P 123) Michael Martin - Cert IV - Codes and Standards 2012

21 Other AS Standards AS – 2000 Termite Management – New Building Work AS – 2000 Termite Management – In and around existing buildings and structures – Guidelines AS – 2000 Termite Management – Assessment criteria for termite management systems AS – 1998 Inspections of Buildings – Timber pest inspections Michael Martin - Cert IV - Codes and Standards 2012

22 Michael Martin - Cert IV - Codes and Standards 2012

23 Reference list ABCB National Construction Code Awareness Resource Kit management-for-builders.html http: (for some images)www.google.com.au Michael Martin - Cert IV - Codes and Standards 2012


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