lesson four – alternative solutions and exercises

Michael Martin - Cert IV - Codes and Standards 2012

CPCCBC4001A Apply building codes and standards to the construction

process for low rise building projects

Lesson Four – Alternative solutions and exercises


Todays Lesson

• Handout (next section P44 to 48 )– Replace from P 44

• Alternative Solutions• Exercises for above


Alternative Solutions – from P43

• When developing an Alternative Solution it should be discussed with the Certifying Authority before lodging an application for approval

• pre-lodgment consultation• The process allows – the Alternative Solution can be developed– the designer to state their intentions – the Certifying Authority to state their needs


Effects on Design

• When an Alternative Solution • it is necessary to select the appropriate

Performance Requirements against which it will be assessed

• known as the holistic approach• Sometimes easy, sometimes takes consideration• The BCA provides a process for selection• Part A0.10 of Volume One - or Part 1.0.10 of

Volume Two (text P 44)


Example P 45


Complying with Performance Requirements

• what the Alternative Solution needs to do in order to comply

• an initial assessment can be made • you can also refer to the Guide to Volume One

of the BCA.• This include lists of issues • develop your own lists • Review samples P46 to 48 in text


Exercise – P 48

• List the issues you think could affect the time to untenable conditions and the time occupants take to evacuate.


Time to untenable conditions

• Time could be influenced by issues such as;– building design – ceiling height– type of fuel – smoke management

system– fire growth – fire brigade

intervention– area of enclosure – etc


Time to evacuate occupants

• Time could be influenced by issues such as;– occupant awareness of danger –ability to locate

exit– occupant capability to evacuate –width of exit– occupant travel speed to exit –occupant

queuing at exit– occupant travel distance –etc


Consideration of Alternative Solutions

• The complexity of the processes for developing or assessing Alternative Solutions will vary depending on the issue being addressed

• However – the processes need to be applied thoroughly regardless of the issue being addressed


Key Messages

• Designers have a choice of two pathways when developing Alternative Solutions – comply with Performance Requirements; or– at least equate to DTS provisions

• When developing Alternative Solutions– hold preliminary discussions with the Certifying

Authority to assess viability– take a holistic view of the content of BCA


Exercise

• Plan set “Und”- New dwelling

• New proposal from client

• At present there is no windows to the Garage ?

• The client has proposed that there be the addition of a 1.2 high x 2.1 long window to the east wall of the garage.


Exercise

• Ask yourself these questions with both standards and council in mind and check

• Why is there no window to start with?– With the BCA what are the light and ventilation

requirements, there is a statement for “habitable rooms” is there one for “non-habitable” ?

– What compliance issues does the window raise, even structurally / standards?

– What council impact would it have? Permissions?


Review Answers• BCA 2012, interpretation 1.1.1.2,

– page 26, habitable room– Page 28, private garage

• BCA 2012, Classification 1.3.2– Class 10a a non-habitable building page 36

• BCA 2012 performance provisions 2.4 – O2.4.4 and O2.4.5 page 71 – F2.4.4 and F2.4.5 page 72– P2.44.4 and P2.4.5 page 73 – 74

• BCA 2012, part 3 acceptable construction– 3.3.3.2 covers lintel sizes, yet flashings and other elements will need to be considered also

• AS for brickwork, glazing, etc.• Council – consider approvals, now view to neighbours, permission, etc.

• What else did you get? For a simple window !


Reference list

• ABCB National Construction Code Awareness Resource Kit

• http://www.timber.net.au/index.php/termite-management-for-builders.html

• http: www.google.com.au (for some images)

http://www.google.com.au/

lesson four – alternative solutions and exercises

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