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Question

Are board walks covered under the NCC ? e.g. boardwalks in National Parks, boardwalks around lakes in municipalities, and pergolas in BBQ areas in national parks, how are they classified ?

Woodsolutions Answer +

Pergolas and boardwalks would seem to fall into Class 10a, non-habitable buildings or structures, more info here: https://puddingln.com.au/resource/building-classification. However, we urge you to seek an opinion from a local authority or building surveyor since we are not experts when it comes to interpretation of the National Construction Code.

National Construction Code

Answered on 18-11-2020
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

Question

I need to design a tie down connection for rafter and top plate for an external garage wall, showing calculations and values with the following information:
N2 wind speed
tie downs are located on a load bearing wall
rafters are at 1200 centres
tie downs at 1200 centres
joint group is JD4.
Could you or are you able to assist me in the right direction please.

Woodsolutions Answer +

Tie-downs can be designed by reference to AS 1684.2, Residential timber-framed construction, or more simply by using our Timber Solutions v2.2 software, available for free download here: https://www.woodsolutions.com.au/articles/span-tables-and-software. We also have a 'User Guide' that simplifies the tie-downs in AS 1684.2, available here: https://woodsolutions.com.au/system/files/AS1684_UserGuide_3_0.pdf.

Tie Downs

Answered on 12-11-2020
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

Question

Can I please speak to someone for independent technical advice on Interior and Exterior coatings to get a slip resistance rating by the PCA. I’m after advice on what I should be specifying for two seperate applications, internal and external, that need to achieve the same colour if possible.

Woodsolutions Answer +

Under the National Construction Code (NCC-2019, vol. 2, clause 3.9.1.4 ), slip resistance is only required for stair treads, landings and ramps. In the case of stair treads and landings it can be achieved by installing slip-resistant nosing strips - only ramps are required to have a slip resistant surface, as explained in an Advisory Note published by the Australian Building Codes Board (ABCB), available here https://www.abcb.gov.au/Resources/Publications/Education-Training/Slip-resistance-for-Stairways-Landings-and-Ramps. Of course, slip resistant coatings can be applied to the surfaces of floors and decks if desired, although not required by NCC-2019. You will find such products on the net if you write 'slip resistant coatings' or similar wording in your browser. For a more detailed treatment of slip resistance refer to our Technical Design Guide #48, titled Slip Resistance and Wood Pedestrian Surfaces, which can be downloaded here: https://www.woodsolutions.com.au/publications.

Slip resistance

Answered on 09-11-2020
Please note that our answer is based on the best advice available at the time. If the National Construction Code, Australian Standards or local requirements have been subsequently amended, our answer may no longer be correct in all details. For more information, please read our disclaimer.

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